21051420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{197}}^1$

素因数の和:359

約数の個数: 96

約数和(自身を含む): 64266048

約数和(自身を除く): 43214628

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 137, 156, 195, 197, 260, 274, 390, 394, 411, 548, 591, 685, 780, 788, 822, 985, 1182, 1370, 1644, 1781, 1970, 2055, 2364, 2561, 2740, 2955, 3562, 3940, 4110, 5122, 5343, 5910, 7124, 7683, 8220, 8905, 10244, 10686, 11820, 12805, 15366, 17810, 21372, 25610, 26715, 26989, 30732, 35620, 38415, 51220, 53430, 53978, 76830, 80967, 106860, 107956, 134945, 153660, 161934, 269890, 323868, 350857, 404835, 539780, 701714, 809670, 1052571, 1403428, 1619340, 1754285, 2105142, 3508570, 4210284, 5262855, 7017140, 10525710, 21051420]

約数ペア:

[(1, 21051420), (2, 10525710), (3, 7017140), (4, 5262855), (5, 4210284), (6, 3508570), (10, 2105142), (12, 1754285), (13, 1619340), (15, 1403428), (20, 1052571), (26, 809670), (30, 701714), (39, 539780), (52, 404835), (60, 350857), (65, 323868), (78, 269890), (130, 161934), (137, 153660), (156, 134945), (195, 107956), (197, 106860), (260, 80967), (274, 76830), (390, 53978), (394, 53430), (411, 51220), (548, 38415), (591, 35620), (685, 30732), (780, 26989), (788, 26715), (822, 25610), (985, 21372), (1182, 17810), (1370, 15366), (1644, 12805), (1781, 11820), (1970, 10686), (2055, 10244), (2364, 8905), (2561, 8220), (2740, 7683), (2955, 7124), (3562, 5910), (3940, 5343), (4110, 5122)]