19907573780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1997}}^1\times {\mathrm{12157}}^1$

素因数の和:14204

約数の個数: 48

約数和(自身を含む): 42850530576

約数和(自身を除く): 22942956796

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 1997, 3994, 7988, 9985, 12157, 19970, 24314, 39940, 48628, 60785, 81877, 121570, 163754, 243140, 327508, 409385, 498437, 818770, 996874, 1637540, 1993748, 2492185, 4984370, 9968740, 24277529, 48555058, 97110116, 121387645, 242775290, 485550580, 995378689, 1990757378, 3981514756, 4976893445, 9953786890, 19907573780]

約数ペア:

[(1, 19907573780), (2, 9953786890), (4, 4976893445), (5, 3981514756), (10, 1990757378), (20, 995378689), (41, 485550580), (82, 242775290), (164, 121387645), (205, 97110116), (410, 48555058), (820, 24277529), (1997, 9968740), (3994, 4984370), (7988, 2492185), (9985, 1993748), (12157, 1637540), (19970, 996874), (24314, 818770), (39940, 498437), (48628, 409385), (60785, 327508), (81877, 243140), (121570, 163754)]