20821420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{35899}}^1$

素因数の和:35937

約数の個数: 24

約数和(自身を含む): 45234000

約数和(自身を除く): 24412580

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 35899, 71798, 143596, 179495, 358990, 717980, 1041071, 2082142, 4164284, 5205355, 10410710, 20821420]

約数ペア:

[(1, 20821420), (2, 10410710), (4, 5205355), (5, 4164284), (10, 2082142), (20, 1041071), (29, 717980), (58, 358990), (116, 179495), (145, 143596), (290, 71798), (580, 35899)]