19913080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{167}}^1\times {\mathrm{271}}^1$

素因数の和:460

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 29438600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 167, 220, 271, 334, 440, 542, 668, 835, 1084, 1336, 1355, 1670, 1837, 2168, 2710, 2981, 3340, 3674, 5420, 5962, 6680, 7348, 9185, 10840, 11924, 14696, 14905, 18370, 23848, 29810, 36740, 45257, 59620, 73480, 90514, 119240, 181028, 226285, 362056, 452570, 497827, 905140, 995654, 1810280, 1991308, 2489135, 3982616, 4978270, 9956540, 19913080]

約数ペア:

[(1, 19913080), (2, 9956540), (4, 4978270), (5, 3982616), (8, 2489135), (10, 1991308), (11, 1810280), (20, 995654), (22, 905140), (40, 497827), (44, 452570), (55, 362056), (88, 226285), (110, 181028), (167, 119240), (220, 90514), (271, 73480), (334, 59620), (440, 45257), (542, 36740), (668, 29810), (835, 23848), (1084, 18370), (1336, 14905), (1355, 14696), (1670, 11924), (1837, 10840), (2168, 9185), (2710, 7348), (2981, 6680), (3340, 5962), (3674, 5420)]