66398680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{40487}}^1$

素因数の和:40539

約数の個数: 32

約数和(自身を含む): 153044640

約数和(自身を除く): 86645960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 40487, 80974, 161948, 202435, 323896, 404870, 809740, 1619480, 1659967, 3319934, 6639868, 8299835, 13279736, 16599670, 33199340, 66398680]

約数ペア:

[(1, 66398680), (2, 33199340), (4, 16599670), (5, 13279736), (8, 8299835), (10, 6639868), (20, 3319934), (40, 1659967), (41, 1619480), (82, 809740), (164, 404870), (205, 323896), (328, 202435), (410, 161948), (820, 80974), (1640, 40487)]