21075275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3413}}^1$

素因数の和:3455

約数の個数: 24

約数和(自身を含む): 29633520

約数和(自身を除く): 8558245

約数列:

[1, 5, 13, 19, 25, 65, 95, 247, 325, 475, 1235, 3413, 6175, 17065, 44369, 64847, 85325, 221845, 324235, 843011, 1109225, 1621175, 4215055, 21075275]

約数ペア:

[(1, 21075275), (5, 4215055), (13, 1621175), (19, 1109225), (25, 843011), (65, 324235), (95, 221845), (247, 85325), (325, 64847), (475, 44369), (1235, 17065), (3413, 6175)]