639472

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{2351}}^1$

素因数の和:2376

約数の個数: 20

約数和(自身を含む): 1312416

約数和(自身を除く): 672944

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 2351, 4702, 9404, 18808, 37616, 39967, 79934, 159868, 319736, 639472]

約数ペア:

[(1, 639472), (2, 319736), (4, 159868), (8, 79934), (16, 39967), (17, 37616), (34, 18808), (68, 9404), (136, 4702), (272, 2351)]