21293740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81899}}^1$

素因数の和:81921

約数の個数: 24

約数和(自身を含む): 48157200

約数和(自身を除く): 26863460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81899, 163798, 327596, 409495, 818990, 1064687, 1637980, 2129374, 4258748, 5323435, 10646870, 21293740]

約数ペア:

[(1, 21293740), (2, 10646870), (4, 5323435), (5, 4258748), (10, 2129374), (13, 1637980), (20, 1064687), (26, 818990), (52, 409495), (65, 327596), (130, 163798), (260, 81899)]