21072545

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{4441}}^1$

素因数の和:4532

約数の個数: 16

約数和(自身を含む): 27611472

約数和(自身を除く): 6538927

約数列:

[1, 5, 13, 65, 73, 365, 949, 4441, 4745, 22205, 57733, 288665, 324193, 1620965, 4214509, 21072545]

約数ペア:

[(1, 21072545), (5, 4214509), (13, 1620965), (65, 324193), (73, 288665), (365, 57733), (949, 22205), (4441, 4745)]