21279772

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{211}}^1\times {\mathrm{1327}}^1$

素因数の和:1561

約数の個数: 24

約数和(自身を含む): 39415040

約数和(自身を除く): 18135268

約数列:

[1, 2, 4, 19, 38, 76, 211, 422, 844, 1327, 2654, 4009, 5308, 8018, 16036, 25213, 50426, 100852, 279997, 559994, 1119988, 5319943, 10639886, 21279772]

約数ペア:

[(1, 21279772), (2, 10639886), (4, 5319943), (19, 1119988), (38, 559994), (76, 279997), (211, 100852), (422, 50426), (844, 25213), (1327, 16036), (2654, 8018), (4009, 5308)]