21021340

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5807}}^1$

素因数の和:5997

約数の個数: 24

約数和(自身を含む): 44396352

約数和(自身を除く): 23375012

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5807, 11614, 23228, 29035, 58070, 116140, 1051067, 2102134, 4204268, 5255335, 10510670, 21021340]

約数ペア:

[(1, 21021340), (2, 10510670), (4, 5255335), (5, 4204268), (10, 2102134), (20, 1051067), (181, 116140), (362, 58070), (724, 29035), (905, 23228), (1810, 11614), (3620, 5807)]