21411980

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{5981}}^1$

素因数の和:6169

約数の個数: 24

約数和(自身を含む): 45223920

約数和(自身を除く): 23811940

約数列:

[1, 2, 4, 5, 10, 20, 179, 358, 716, 895, 1790, 3580, 5981, 11962, 23924, 29905, 59810, 119620, 1070599, 2141198, 4282396, 5352995, 10705990, 21411980]

約数ペア:

[(1, 21411980), (2, 10705990), (4, 5352995), (5, 4282396), (10, 2141198), (20, 1070599), (179, 119620), (358, 59810), (716, 29905), (895, 23924), (1790, 11962), (3580, 5981)]