21291530

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163781}}^1$

素因数の和:163801

約数の個数: 16

約数和(自身を含む): 41273064

約数和(自身を除く): 19981534

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 163781, 327562, 818905, 1637810, 2129153, 4258306, 10645765, 21291530]

約数ペア:

[(1, 21291530), (2, 10645765), (5, 4258306), (10, 2129153), (13, 1637810), (26, 818905), (65, 327562), (130, 163781)]