21028560

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12517}}^1$

素因数の和:12540

約数の個数: 80

約数和(自身を含む): 74507136

約数和(自身を除く): 53478576

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12517, 25034, 37551, 50068, 62585, 75102, 87619, 100136, 125170, 150204, 175238, 187755, 200272, 250340, 262857, 300408, 350476, 375510, 438095, 500680, 525714, 600816, 700952, 751020, 876190, 1001360, 1051428, 1314285, 1401904, 1502040, 1752380, 2102856, 2628570, 3004080, 3504760, 4205712, 5257140, 7009520, 10514280, 21028560]

約数ペア:

[(1, 21028560), (2, 10514280), (3, 7009520), (4, 5257140), (5, 4205712), (6, 3504760), (7, 3004080), (8, 2628570), (10, 2102856), (12, 1752380), (14, 1502040), (15, 1401904), (16, 1314285), (20, 1051428), (21, 1001360), (24, 876190), (28, 751020), (30, 700952), (35, 600816), (40, 525714), (42, 500680), (48, 438095), (56, 375510), (60, 350476), (70, 300408), (80, 262857), (84, 250340), (105, 200272), (112, 187755), (120, 175238), (140, 150204), (168, 125170), (210, 100136), (240, 87619), (280, 75102), (336, 62585), (420, 50068), (560, 37551), (840, 25034), (1680, 12517)]