639820816

素因数分解:

$2^4\times {\mathrm{39988801}}^1$

素因数の和:39988809

約数の個数: 10

約数和(自身を含む): 1239652862

約数和(自身を除く): 599832046

約数列:

[1, 2, 4, 8, 16, 39988801, 79977602, 159955204, 319910408, 639820816]

約数ペア:

[(1, 639820816), (2, 319910408), (4, 159955204), (8, 79977602), (16, 39988801)]