Metal powder for powder metallurgy, compound, granulated powder, sintered body, and heat resistant component

A metal powder for powder metallurgy comprising:

• Co as a principal component;
• Cr in a proportion of 10 mass % or more and 25 mass % or less;
• Ni in a proportion of 5 mass % or more and 40 mass % or less;
• at least one of Mo and W in a proportion of 2 mass % or more and 20 mass % or less in total;
• Si in a proportion of 0.3 mass % or more and 1.5 mass % or less;
• and
• C in a proportion of 0.05 mass % or more and 0.8 mass % or less, wherein
• when one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, and one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta, and having a higher group number in the periodic table than that of the first element or having the same group number in the periodic table as that of the first element and a higher period number in the periodic table than that of the first element is defined as a second element,
• the first element is contained in a proportion of 0.01 mass % or more and 0.5 mass % or less, and
• the second element is contained in a proportion of 0.01 mass % or more and 0.5 mass % or less.