639853288

素因数分解:

$2^3\times {\mathrm{661}}^1\times {\mathrm{121001}}^1$

素因数の和:121668

約数の個数: 16

約数和(自身を含む): 1201549860

約数和(自身を除く): 561696572

約数列:

[1, 2, 4, 8, 661, 1322, 2644, 5288, 121001, 242002, 484004, 968008, 79981661, 159963322, 319926644, 639853288]

約数ペア:

[(1, 639853288), (2, 319926644), (4, 159963322), (8, 79981661), (661, 968008), (1322, 484004), (2644, 242002), (5288, 121001)]