12991615

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{4079}}^1$

素因数の和:4111

約数の個数: 24

約数和(自身を含む): 19535040

約数和(自身を除く): 6543425

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 4079, 20395, 28553, 53027, 142765, 199871, 265135, 371189, 999355, 1855945, 2598323, 12991615]

約数ペア:

[(1, 12991615), (5, 2598323), (7, 1855945), (13, 999355), (35, 371189), (49, 265135), (65, 199871), (91, 142765), (245, 53027), (455, 28553), (637, 20395), (3185, 4079)]