20612680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{593}}^1$

素因数の和:694

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 30708920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 593, 632, 790, 869, 1186, 1580, 1738, 2372, 2965, 3160, 3476, 4345, 4744, 5930, 6523, 6952, 8690, 11860, 13046, 17380, 23720, 26092, 32615, 34760, 46847, 52184, 65230, 93694, 130460, 187388, 234235, 260920, 374776, 468470, 515317, 936940, 1030634, 1873880, 2061268, 2576585, 4122536, 5153170, 10306340, 20612680]

約数ペア:

[(1, 20612680), (2, 10306340), (4, 5153170), (5, 4122536), (8, 2576585), (10, 2061268), (11, 1873880), (20, 1030634), (22, 936940), (40, 515317), (44, 468470), (55, 374776), (79, 260920), (88, 234235), (110, 187388), (158, 130460), (220, 93694), (316, 65230), (395, 52184), (440, 46847), (593, 34760), (632, 32615), (790, 26092), (869, 23720), (1186, 17380), (1580, 13046), (1738, 11860), (2372, 8690), (2965, 6952), (3160, 6523), (3476, 5930), (4345, 4744)]