21246680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{449}}^1$

素因数の和:493

約数の個数: 96

約数和(自身を含む): 59292000

約数和(自身を除く): 38045320

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 169, 182, 260, 280, 338, 364, 449, 455, 520, 676, 728, 845, 898, 910, 1183, 1352, 1690, 1796, 1820, 2245, 2366, 3143, 3380, 3592, 3640, 4490, 4732, 5837, 5915, 6286, 6760, 8980, 9464, 11674, 11830, 12572, 15715, 17960, 23348, 23660, 25144, 29185, 31430, 40859, 46696, 47320, 58370, 62860, 75881, 81718, 116740, 125720, 151762, 163436, 204295, 233480, 303524, 326872, 379405, 408590, 531167, 607048, 758810, 817180, 1062334, 1517620, 1634360, 2124668, 2655835, 3035240, 4249336, 5311670, 10623340, 21246680]

約数ペア:

[(1, 21246680), (2, 10623340), (4, 5311670), (5, 4249336), (7, 3035240), (8, 2655835), (10, 2124668), (13, 1634360), (14, 1517620), (20, 1062334), (26, 817180), (28, 758810), (35, 607048), (40, 531167), (52, 408590), (56, 379405), (65, 326872), (70, 303524), (91, 233480), (104, 204295), (130, 163436), (140, 151762), (169, 125720), (182, 116740), (260, 81718), (280, 75881), (338, 62860), (364, 58370), (449, 47320), (455, 46696), (520, 40859), (676, 31430), (728, 29185), (845, 25144), (898, 23660), (910, 23348), (1183, 17960), (1352, 15715), (1690, 12572), (1796, 11830), (1820, 11674), (2245, 9464), (2366, 8980), (3143, 6760), (3380, 6286), (3592, 5915), (3640, 5837), (4490, 4732)]