20409620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{457}}^1$

素因数の和:513

約数の個数: 96

約数和(自身を含む): 55399680

約数和(自身を除く): 34990060

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 29, 35, 44, 55, 58, 70, 77, 110, 116, 140, 145, 154, 203, 220, 290, 308, 319, 385, 406, 457, 580, 638, 770, 812, 914, 1015, 1276, 1540, 1595, 1828, 2030, 2233, 2285, 3190, 3199, 4060, 4466, 4570, 5027, 6380, 6398, 8932, 9140, 10054, 11165, 12796, 13253, 15995, 20108, 22330, 25135, 26506, 31990, 35189, 44660, 50270, 53012, 63980, 66265, 70378, 92771, 100540, 132530, 140756, 145783, 175945, 185542, 265060, 291566, 351890, 371084, 463855, 583132, 703780, 728915, 927710, 1020481, 1457830, 1855420, 2040962, 2915660, 4081924, 5102405, 10204810, 20409620]

約数ペア:

[(1, 20409620), (2, 10204810), (4, 5102405), (5, 4081924), (7, 2915660), (10, 2040962), (11, 1855420), (14, 1457830), (20, 1020481), (22, 927710), (28, 728915), (29, 703780), (35, 583132), (44, 463855), (55, 371084), (58, 351890), (70, 291566), (77, 265060), (110, 185542), (116, 175945), (140, 145783), (145, 140756), (154, 132530), (203, 100540), (220, 92771), (290, 70378), (308, 66265), (319, 63980), (385, 53012), (406, 50270), (457, 44660), (580, 35189), (638, 31990), (770, 26506), (812, 25135), (914, 22330), (1015, 20108), (1276, 15995), (1540, 13253), (1595, 12796), (1828, 11165), (2030, 10054), (2233, 9140), (2285, 8932), (3190, 6398), (3199, 6380), (4060, 5027), (4466, 4570)]