20533520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{991}}^1$

素因数の和:1048

約数の個数: 80

約数和(自身を含む): 56091648

約数和(自身を除く): 35558128

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 185, 259, 280, 296, 370, 518, 560, 592, 740, 991, 1036, 1295, 1480, 1982, 2072, 2590, 2960, 3964, 4144, 4955, 5180, 6937, 7928, 9910, 10360, 13874, 15856, 19820, 20720, 27748, 34685, 36667, 39640, 55496, 69370, 73334, 79280, 110992, 138740, 146668, 183335, 256669, 277480, 293336, 366670, 513338, 554960, 586672, 733340, 1026676, 1283345, 1466680, 2053352, 2566690, 2933360, 4106704, 5133380, 10266760, 20533520]

約数ペア:

[(1, 20533520), (2, 10266760), (4, 5133380), (5, 4106704), (7, 2933360), (8, 2566690), (10, 2053352), (14, 1466680), (16, 1283345), (20, 1026676), (28, 733340), (35, 586672), (37, 554960), (40, 513338), (56, 366670), (70, 293336), (74, 277480), (80, 256669), (112, 183335), (140, 146668), (148, 138740), (185, 110992), (259, 79280), (280, 73334), (296, 69370), (370, 55496), (518, 39640), (560, 36667), (592, 34685), (740, 27748), (991, 20720), (1036, 19820), (1295, 15856), (1480, 13874), (1982, 10360), (2072, 9910), (2590, 7928), (2960, 6937), (3964, 5180), (4144, 4955)]