21581072

素因数分解:

$2^4\times {\mathrm{523}}^1\times {\mathrm{2579}}^1$

素因数の和:3110

約数の個数: 20

約数和(自身を含む): 41909520

約数和(自身を除く): 20328448

約数列:

[1, 2, 4, 8, 16, 523, 1046, 2092, 2579, 4184, 5158, 8368, 10316, 20632, 41264, 1348817, 2697634, 5395268, 10790536, 21581072]

約数ペア:

[(1, 21581072), (2, 10790536), (4, 5395268), (8, 2697634), (16, 1348817), (523, 41264), (1046, 20632), (2092, 10316), (2579, 8368), (4184, 5158)]