21418893

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{491}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 32082336

約数和(自身を除く): 10663443

約数列:

[1, 3, 9, 37, 111, 131, 333, 393, 491, 1179, 1473, 4419, 4847, 14541, 18167, 43623, 54501, 64321, 163503, 192963, 578889, 2379877, 7139631, 21418893]

約数ペア:

[(1, 21418893), (3, 7139631), (9, 2379877), (37, 578889), (111, 192963), (131, 163503), (333, 64321), (393, 54501), (491, 43623), (1179, 18167), (1473, 14541), (4419, 4847)]