21427945

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7951}}^1$

素因数の和:7981

約数の個数: 24

約数和(自身を含む): 32635008

約数和(自身を除く): 11207063

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 385, 539, 2695, 7951, 39755, 55657, 87461, 278285, 389599, 437305, 612227, 1947995, 3061135, 4285589, 21427945]

約数ペア:

[(1, 21427945), (5, 4285589), (7, 3061135), (11, 1947995), (35, 612227), (49, 437305), (55, 389599), (77, 278285), (245, 87461), (385, 55657), (539, 39755), (2695, 7951)]