127968020

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{12281}}^1$

素因数の和:12811

約数の個数: 24

約数和(自身を含む): 269270568

約数和(自身を除く): 141302548

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 2084, 2605, 5210, 10420, 12281, 24562, 49124, 61405, 122810, 245620, 6398401, 12796802, 25593604, 31992005, 63984010, 127968020]

約数ペア:

[(1, 127968020), (2, 63984010), (4, 31992005), (5, 25593604), (10, 12796802), (20, 6398401), (521, 245620), (1042, 122810), (2084, 61405), (2605, 49124), (5210, 24562), (10420, 12281)]