1331509985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{660799}}^1$

素因数の和:660848

約数の個数: 16

約数和(自身を含む): 1776230400

約数和(自身を除く): 444720415

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 660799, 3303995, 8590387, 20484769, 42951935, 102423845, 266301997, 1331509985]

約数ペア:

[(1, 1331509985), (5, 266301997), (13, 102423845), (31, 42951935), (65, 20484769), (155, 8590387), (403, 3303995), (2015, 660799)]