20281521

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{109}}^1\times {\mathrm{367}}^1$

素因数の和:505

約数の個数: 24

約数和(自身を含む): 29631360

約数和(自身を除く): 9349839

約数列:

[1, 3, 13, 39, 109, 169, 327, 367, 507, 1101, 1417, 4251, 4771, 14313, 18421, 40003, 55263, 62023, 120009, 186069, 520039, 1560117, 6760507, 20281521]

約数ペア:

[(1, 20281521), (3, 6760507), (13, 1560117), (39, 520039), (109, 186069), (169, 120009), (327, 62023), (367, 55263), (507, 40003), (1101, 18421), (1417, 14313), (4251, 4771)]