21132579

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^3\times {\mathrm{79}}^1$

素因数の和:152

約数の個数: 32

約数和(自身を含む): 32435200

約数和(自身を除く): 11302621

約数列:

[1, 3, 13, 19, 39, 57, 79, 237, 247, 361, 741, 1027, 1083, 1501, 3081, 4503, 4693, 6859, 14079, 19513, 20577, 28519, 58539, 85557, 89167, 267501, 370747, 541861, 1112241, 1625583, 7044193, 21132579]

約数ペア:

[(1, 21132579), (3, 7044193), (13, 1625583), (19, 1112241), (39, 541861), (57, 370747), (79, 267501), (237, 89167), (247, 85557), (361, 58539), (741, 28519), (1027, 20577), (1083, 19513), (1501, 14079), (3081, 6859), (4503, 4693)]