28155820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{389}}^1$

素因数の和:463

約数の個数: 96

約数和(自身を含む): 75479040

約数和(自身を除く): 47323220

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 47, 55, 70, 77, 94, 110, 140, 154, 188, 220, 235, 308, 329, 385, 389, 470, 517, 658, 770, 778, 940, 1034, 1316, 1540, 1556, 1645, 1945, 2068, 2585, 2723, 3290, 3619, 3890, 4279, 5170, 5446, 6580, 7238, 7780, 8558, 10340, 10892, 13615, 14476, 17116, 18095, 18283, 21395, 27230, 29953, 36190, 36566, 42790, 54460, 59906, 72380, 73132, 85580, 91415, 119812, 127981, 149765, 182830, 201113, 255962, 299530, 365660, 402226, 511924, 599060, 639905, 804452, 1005565, 1279810, 1407791, 2011130, 2559620, 2815582, 4022260, 5631164, 7038955, 14077910, 28155820]

約数ペア:

[(1, 28155820), (2, 14077910), (4, 7038955), (5, 5631164), (7, 4022260), (10, 2815582), (11, 2559620), (14, 2011130), (20, 1407791), (22, 1279810), (28, 1005565), (35, 804452), (44, 639905), (47, 599060), (55, 511924), (70, 402226), (77, 365660), (94, 299530), (110, 255962), (140, 201113), (154, 182830), (188, 149765), (220, 127981), (235, 119812), (308, 91415), (329, 85580), (385, 73132), (389, 72380), (470, 59906), (517, 54460), (658, 42790), (770, 36566), (778, 36190), (940, 29953), (1034, 27230), (1316, 21395), (1540, 18283), (1556, 18095), (1645, 17116), (1945, 14476), (2068, 13615), (2585, 10892), (2723, 10340), (3290, 8558), (3619, 7780), (3890, 7238), (4279, 6580), (5170, 5446)]