81605920

素因数分解:

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

素因数の和:458

約数の個数: 96

約数和(自身を含む): 212284800

約数和(自身を除く): 130678880

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 199, 220, 233, 352, 398, 440, 466, 796, 880, 932, 995, 1165, 1592, 1760, 1864, 1990, 2189, 2330, 2563, 3184, 3728, 3980, 4378, 4660, 5126, 6368, 7456, 7960, 8756, 9320, 10252, 10945, 12815, 15920, 17512, 18640, 20504, 21890, 25630, 31840, 35024, 37280, 41008, 43780, 46367, 51260, 70048, 82016, 87560, 92734, 102520, 175120, 185468, 205040, 231835, 350240, 370936, 410080, 463670, 510037, 741872, 927340, 1020074, 1483744, 1854680, 2040148, 2550185, 3709360, 4080296, 5100370, 7418720, 8160592, 10200740, 16321184, 20401480, 40802960, 81605920]

約数ペア:

[(1, 81605920), (2, 40802960), (4, 20401480), (5, 16321184), (8, 10200740), (10, 8160592), (11, 7418720), (16, 5100370), (20, 4080296), (22, 3709360), (32, 2550185), (40, 2040148), (44, 1854680), (55, 1483744), (80, 1020074), (88, 927340), (110, 741872), (160, 510037), (176, 463670), (199, 410080), (220, 370936), (233, 350240), (352, 231835), (398, 205040), (440, 185468), (466, 175120), (796, 102520), (880, 92734), (932, 87560), (995, 82016), (1165, 70048), (1592, 51260), (1760, 46367), (1864, 43780), (1990, 41008), (2189, 37280), (2330, 35024), (2563, 31840), (3184, 25630), (3728, 21890), (3980, 20504), (4378, 18640), (4660, 17512), (5126, 15920), (6368, 12815), (7456, 10945), (7960, 10252), (8756, 9320)]