21461520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{223}}^1\times {\mathrm{401}}^1$

素因数の和:640

約数の個数: 80

約数和(自身を含む): 66995712

約数和(自身を除く): 45534192

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 223, 240, 401, 446, 669, 802, 892, 1115, 1203, 1338, 1604, 1784, 2005, 2230, 2406, 2676, 3208, 3345, 3568, 4010, 4460, 4812, 5352, 6015, 6416, 6690, 8020, 8920, 9624, 10704, 12030, 13380, 16040, 17840, 19248, 24060, 26760, 32080, 48120, 53520, 89423, 96240, 178846, 268269, 357692, 447115, 536538, 715384, 894230, 1073076, 1341345, 1430768, 1788460, 2146152, 2682690, 3576920, 4292304, 5365380, 7153840, 10730760, 21461520]

約数ペア:

[(1, 21461520), (2, 10730760), (3, 7153840), (4, 5365380), (5, 4292304), (6, 3576920), (8, 2682690), (10, 2146152), (12, 1788460), (15, 1430768), (16, 1341345), (20, 1073076), (24, 894230), (30, 715384), (40, 536538), (48, 447115), (60, 357692), (80, 268269), (120, 178846), (223, 96240), (240, 89423), (401, 53520), (446, 48120), (669, 32080), (802, 26760), (892, 24060), (1115, 19248), (1203, 17840), (1338, 16040), (1604, 13380), (1784, 12030), (2005, 10704), (2230, 9624), (2406, 8920), (2676, 8020), (3208, 6690), (3345, 6416), (3568, 6015), (4010, 5352), (4460, 4812)]