20401480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{233}}^1$

素因数の和:454

約数の個数: 64

約数和(自身を含む): 50544000

約数和(自身を除く): 30142520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 199, 220, 233, 398, 440, 466, 796, 932, 995, 1165, 1592, 1864, 1990, 2189, 2330, 2563, 3980, 4378, 4660, 5126, 7960, 8756, 9320, 10252, 10945, 12815, 17512, 20504, 21890, 25630, 43780, 46367, 51260, 87560, 92734, 102520, 185468, 231835, 370936, 463670, 510037, 927340, 1020074, 1854680, 2040148, 2550185, 4080296, 5100370, 10200740, 20401480]

約数ペア:

[(1, 20401480), (2, 10200740), (4, 5100370), (5, 4080296), (8, 2550185), (10, 2040148), (11, 1854680), (20, 1020074), (22, 927340), (40, 510037), (44, 463670), (55, 370936), (88, 231835), (110, 185468), (199, 102520), (220, 92734), (233, 87560), (398, 51260), (440, 46367), (466, 43780), (796, 25630), (932, 21890), (995, 20504), (1165, 17512), (1592, 12815), (1864, 10945), (1990, 10252), (2189, 9320), (2330, 8756), (2563, 7960), (3980, 5126), (4378, 4660)]