21072020

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5821}}^1$

素因数の和:6011

約数の個数: 24

約数和(自身を含む): 44503368

約数和(自身を除く): 23431348

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5821, 11642, 23284, 29105, 58210, 116420, 1053601, 2107202, 4214404, 5268005, 10536010, 21072020]

約数ペア:

[(1, 21072020), (2, 10536010), (4, 5268005), (5, 4214404), (10, 2107202), (20, 1053601), (181, 116420), (362, 58210), (724, 29105), (905, 23284), (1810, 11642), (3620, 5821)]