18788427

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{4889}}^1$

素因数の和:4963

約数の個数: 24

約数和(自身を含む): 31530720

約数和(自身を除く): 12742293

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 4889, 14667, 34223, 44001, 102669, 298229, 308007, 894687, 2087603, 2684061, 6262809, 18788427]

約数ペア:

[(1, 18788427), (3, 6262809), (7, 2684061), (9, 2087603), (21, 894687), (61, 308007), (63, 298229), (183, 102669), (427, 44001), (549, 34223), (1281, 14667), (3843, 4889)]