18012940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1997}}^1$

素因数の和:2058

約数の個数: 48

約数和(自身を含む): 42293664

約数和(自身を除く): 24280724

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 1997, 2255, 3994, 4510, 7988, 9020, 9985, 19970, 21967, 39940, 43934, 81877, 87868, 109835, 163754, 219670, 327508, 409385, 439340, 818770, 900647, 1637540, 1801294, 3602588, 4503235, 9006470, 18012940]

約数ペア:

[(1, 18012940), (2, 9006470), (4, 4503235), (5, 3602588), (10, 1801294), (11, 1637540), (20, 900647), (22, 818770), (41, 439340), (44, 409385), (55, 327508), (82, 219670), (110, 163754), (164, 109835), (205, 87868), (220, 81877), (410, 43934), (451, 39940), (820, 21967), (902, 19970), (1804, 9985), (1997, 9020), (2255, 7988), (3994, 4510)]