128259640

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{11411}}^1$

素因数の和:11703

約数の個数: 32

約数和(自身を含む): 289636560

約数和(自身を除く): 161376920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 2248, 2810, 5620, 11240, 11411, 22822, 45644, 57055, 91288, 114110, 228220, 456440, 3206491, 6412982, 12825964, 16032455, 25651928, 32064910, 64129820, 128259640]

約数ペア:

[(1, 128259640), (2, 64129820), (4, 32064910), (5, 25651928), (8, 16032455), (10, 12825964), (20, 6412982), (40, 3206491), (281, 456440), (562, 228220), (1124, 114110), (1405, 91288), (2248, 57055), (2810, 45644), (5620, 22822), (11240, 11411)]