20811560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{233}}^1$

素因数の和:291

約数の個数: 128

約数和(自身を含む): 60652800

約数和(自身を除く): 39841240

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 29, 35, 40, 44, 55, 56, 58, 70, 77, 88, 110, 116, 140, 145, 154, 203, 220, 232, 233, 280, 290, 308, 319, 385, 406, 440, 466, 580, 616, 638, 770, 812, 932, 1015, 1160, 1165, 1276, 1540, 1595, 1624, 1631, 1864, 2030, 2233, 2330, 2552, 2563, 3080, 3190, 3262, 4060, 4466, 4660, 5126, 6380, 6524, 6757, 8120, 8155, 8932, 9320, 10252, 11165, 12760, 12815, 13048, 13514, 16310, 17864, 17941, 20504, 22330, 25630, 27028, 32620, 33785, 35882, 44660, 47299, 51260, 54056, 65240, 67570, 71764, 74327, 89320, 89705, 94598, 102520, 135140, 143528, 148654, 179410, 189196, 236495, 270280, 297308, 358820, 371635, 378392, 472990, 520289, 594616, 717640, 743270, 945980, 1040578, 1486540, 1891960, 2081156, 2601445, 2973080, 4162312, 5202890, 10405780, 20811560]

約数ペア:

[(1, 20811560), (2, 10405780), (4, 5202890), (5, 4162312), (7, 2973080), (8, 2601445), (10, 2081156), (11, 1891960), (14, 1486540), (20, 1040578), (22, 945980), (28, 743270), (29, 717640), (35, 594616), (40, 520289), (44, 472990), (55, 378392), (56, 371635), (58, 358820), (70, 297308), (77, 270280), (88, 236495), (110, 189196), (116, 179410), (140, 148654), (145, 143528), (154, 135140), (203, 102520), (220, 94598), (232, 89705), (233, 89320), (280, 74327), (290, 71764), (308, 67570), (319, 65240), (385, 54056), (406, 51260), (440, 47299), (466, 44660), (580, 35882), (616, 33785), (638, 32620), (770, 27028), (812, 25630), (932, 22330), (1015, 20504), (1160, 17941), (1165, 17864), (1276, 16310), (1540, 13514), (1595, 13048), (1624, 12815), (1631, 12760), (1864, 11165), (2030, 10252), (2233, 9320), (2330, 8932), (2552, 8155), (2563, 8120), (3080, 6757), (3190, 6524), (3262, 6380), (4060, 5126), (4466, 4660)]