1640804680

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{129401}}^1$

素因数の和:129729

約数の個数: 32

約数和(自身を含む): 3703485240

約数和(自身を除く): 2062680560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1585, 2536, 3170, 6340, 12680, 129401, 258802, 517604, 647005, 1035208, 1294010, 2588020, 5176040, 41020117, 82040234, 164080468, 205100585, 328160936, 410201170, 820402340, 1640804680]

約数ペア:

[(1, 1640804680), (2, 820402340), (4, 410201170), (5, 328160936), (8, 205100585), (10, 164080468), (20, 82040234), (40, 41020117), (317, 5176040), (634, 2588020), (1268, 1294010), (1585, 1035208), (2536, 647005), (3170, 517604), (6340, 258802), (12680, 129401)]