21860180

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12281}}^1$

素因数の和:12379

約数の個数: 24

約数和(自身を含む): 46425960

約数和(自身を除く): 24565780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12281, 24562, 49124, 61405, 122810, 245620, 1093009, 2186018, 4372036, 5465045, 10930090, 21860180]

約数ペア:

[(1, 21860180), (2, 10930090), (4, 5465045), (5, 4372036), (10, 2186018), (20, 1093009), (89, 245620), (178, 122810), (356, 61405), (445, 49124), (890, 24562), (1780, 12281)]