638963240

素因数分解:

$2^3\times 5^1\times {\mathrm{15974081}}^1$

素因数の和:15974092

約数の個数: 16

約数和(自身を含む): 1437667380

約数和(自身を除く): 798704140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 15974081, 31948162, 63896324, 79870405, 127792648, 159740810, 319481620, 638963240]

約数ペア:

[(1, 638963240), (2, 319481620), (4, 159740810), (5, 127792648), (8, 79870405), (10, 63896324), (20, 31948162), (40, 15974081)]