21085265

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{971}}^1$

素因数の和:1120

約数の個数: 16

約数和(自身を含む): 26174016

約数和(自身を除く): 5088751

約数列:

[1, 5, 43, 101, 215, 505, 971, 4343, 4855, 21715, 41753, 98071, 208765, 490355, 4217053, 21085265]

約数ペア:

[(1, 21085265), (5, 4217053), (43, 490355), (101, 208765), (215, 98071), (505, 41753), (971, 21715), (4343, 4855)]