21210808

素因数分解:

$2^3\times {\mathrm{101}}^1\times {\mathrm{26251}}^1$

素因数の和:26358

約数の個数: 16

約数和(自身を含む): 40165560

約数和(自身を除く): 18954752

約数列:

[1, 2, 4, 8, 101, 202, 404, 808, 26251, 52502, 105004, 210008, 2651351, 5302702, 10605404, 21210808]

約数ペア:

[(1, 21210808), (2, 10605404), (4, 5302702), (8, 2651351), (101, 210008), (202, 105004), (404, 52502), (808, 26251)]