21136479

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{557}}^1$

素因数の和:719

約数の個数: 32

約数和(自身を含む): 34997760

約数和(自身を除く): 13861281

約数列:

[1, 3, 7, 13, 21, 39, 91, 139, 273, 417, 557, 973, 1671, 1807, 2919, 3899, 5421, 7241, 11697, 12649, 21723, 37947, 50687, 77423, 152061, 232269, 541961, 1006499, 1625883, 3019497, 7045493, 21136479]

約数ペア:

[(1, 21136479), (3, 7045493), (7, 3019497), (13, 1625883), (21, 1006499), (39, 541961), (91, 232269), (139, 152061), (273, 77423), (417, 50687), (557, 37947), (973, 21723), (1671, 12649), (1807, 11697), (2919, 7241), (3899, 5421)]