21978410

素因数分解:

$2^1\times 5^1\times {\mathrm{1181}}^1\times {\mathrm{1861}}^1$

素因数の和:3049

約数の個数: 16

約数和(自身を含む): 39615912

約数和(自身を除く): 17637502

約数列:

[1, 2, 5, 10, 1181, 1861, 2362, 3722, 5905, 9305, 11810, 18610, 2197841, 4395682, 10989205, 21978410]

約数ペア:

[(1, 21978410), (2, 10989205), (5, 4395682), (10, 2197841), (1181, 18610), (1861, 11810), (2362, 9305), (3722, 5905)]