21296665

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19273}}^1$

素因数の和:19308

約数の個数: 16

約数和(自身を含む): 29142288

約数和(自身を除く): 7845623

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19273, 96365, 250549, 327641, 1252745, 1638205, 4259333, 21296665]

約数ペア:

[(1, 21296665), (5, 4259333), (13, 1638205), (17, 1252745), (65, 327641), (85, 250549), (221, 96365), (1105, 19273)]