20391651

素因数分解:

$3^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{4831}}^1$

素因数の和:4911

約数の個数: 24

約数和(自身を含む): 34171904

約数和(自身を除く): 13780253

約数列:

[1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 1407, 4221, 4831, 14493, 33817, 43479, 101451, 304353, 323677, 971031, 2265739, 2913093, 6797217, 20391651]

約数ペア:

[(1, 20391651), (3, 6797217), (7, 2913093), (9, 2265739), (21, 971031), (63, 323677), (67, 304353), (201, 101451), (469, 43479), (603, 33817), (1407, 14493), (4221, 4831)]