21531770

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{1861}}^1$

素因数の和:1970

約数の個数: 32

約数和(自身を含む): 42230160

約数和(自身を除く): 20698390

約数列:

[1, 2, 5, 10, 13, 26, 65, 89, 130, 178, 445, 890, 1157, 1861, 2314, 3722, 5785, 9305, 11570, 18610, 24193, 48386, 120965, 165629, 241930, 331258, 828145, 1656290, 2153177, 4306354, 10765885, 21531770]

約数ペア:

[(1, 21531770), (2, 10765885), (5, 4306354), (10, 2153177), (13, 1656290), (26, 828145), (65, 331258), (89, 241930), (130, 165629), (178, 120965), (445, 48386), (890, 24193), (1157, 18610), (1861, 11570), (2314, 9305), (3722, 5785)]