21908991

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{547}}^1$

素因数の和:655

約数の個数: 24

約数和(自身を含む): 32090880

約数和(自身を除く): 10181889

約数列:

[1, 3, 13, 39, 79, 169, 237, 507, 547, 1027, 1641, 3081, 7111, 13351, 21333, 40053, 43213, 92443, 129639, 277329, 561769, 1685307, 7302997, 21908991]

約数ペア:

[(1, 21908991), (3, 7302997), (13, 1685307), (39, 561769), (79, 277329), (169, 129639), (237, 92443), (507, 43213), (547, 40053), (1027, 21333), (1641, 13351), (3081, 7111)]