21367557

素因数分解:

$3^4\times {\mathrm{151}}^1\times {\mathrm{1747}}^1$

素因数の和:1910

約数の個数: 20

約数和(自身を含む): 32149216

約数和(自身を除く): 10781659

約数列:

[1, 3, 9, 27, 81, 151, 453, 1359, 1747, 4077, 5241, 12231, 15723, 47169, 141507, 263797, 791391, 2374173, 7122519, 21367557]

約数ペア:

[(1, 21367557), (3, 7122519), (9, 2374173), (27, 791391), (81, 263797), (151, 141507), (453, 47169), (1359, 15723), (1747, 12231), (4077, 5241)]