17985880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{997}}^1$

素因数の和:1060

約数の個数: 64

約数和(自身を含む): 45269280

約数和(自身を除く): 27283400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 997, 1640, 1804, 1994, 2255, 3608, 3988, 4510, 4985, 7976, 9020, 9970, 10967, 18040, 19940, 21934, 39880, 40877, 43868, 54835, 81754, 87736, 109670, 163508, 204385, 219340, 327016, 408770, 438680, 449647, 817540, 899294, 1635080, 1798588, 2248235, 3597176, 4496470, 8992940, 17985880]

約数ペア:

[(1, 17985880), (2, 8992940), (4, 4496470), (5, 3597176), (8, 2248235), (10, 1798588), (11, 1635080), (20, 899294), (22, 817540), (40, 449647), (41, 438680), (44, 408770), (55, 327016), (82, 219340), (88, 204385), (110, 163508), (164, 109670), (205, 87736), (220, 81754), (328, 54835), (410, 43868), (440, 40877), (451, 39880), (820, 21934), (902, 19940), (997, 18040), (1640, 10967), (1804, 9970), (1994, 9020), (2255, 7976), (3608, 4985), (3988, 4510)]