16221220

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{4481}}^1$

素因数の和:4671

約数の個数: 24

約数和(自身を含む): 34260408

約数和(自身を除く): 18039188

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 4481, 8962, 17924, 22405, 44810, 89620, 811061, 1622122, 3244244, 4055305, 8110610, 16221220]

約数ペア:

[(1, 16221220), (2, 8110610), (4, 4055305), (5, 3244244), (10, 1622122), (20, 811061), (181, 89620), (362, 44810), (724, 22405), (905, 17924), (1810, 8962), (3620, 4481)]