8161220

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1049}}^1$

素因数の和:1447

約数の個数: 24

約数和(自身を含む): 17199000

約数和(自身を除く): 9037780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1049, 1556, 1945, 2098, 3890, 4196, 5245, 7780, 10490, 20980, 408061, 816122, 1632244, 2040305, 4080610, 8161220]

約数ペア:

[(1, 8161220), (2, 4080610), (4, 2040305), (5, 1632244), (10, 816122), (20, 408061), (389, 20980), (778, 10490), (1049, 7780), (1556, 5245), (1945, 4196), (2098, 3890)]