21131215209

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1299343}}^1$

素因数の和:1299501

約数の個数: 24

約数和(自身を含む): 33107285120

約数和(自身を除く): 11976069911

約数列:

[1, 3, 9, 13, 39, 117, 139, 417, 1251, 1807, 5421, 16263, 1299343, 3898029, 11694087, 16891459, 50674377, 152023131, 180608677, 541826031, 1625478093, 2347912801, 7043738403, 21131215209]

約数ペア:

[(1, 21131215209), (3, 7043738403), (9, 2347912801), (13, 1625478093), (39, 541826031), (117, 180608677), (139, 152023131), (417, 50674377), (1251, 16891459), (1807, 11694087), (5421, 3898029), (16263, 1299343)]