1291615

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{641}}^1$

素因数の和:690

約数の個数: 16

約数和(自身を含む): 1725696

約数和(自身を除く): 434081

約数列:

[1, 5, 13, 31, 65, 155, 403, 641, 2015, 3205, 8333, 19871, 41665, 99355, 258323, 1291615]

約数ペア:

[(1, 1291615), (5, 258323), (13, 99355), (31, 41665), (65, 19871), (155, 8333), (403, 3205), (641, 2015)]