20518120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{577}}^1$

素因数の和:722

約数の個数: 64

約数和(自身を含む): 53268480

約数和(自身を除く): 32750360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 577, 635, 889, 1016, 1154, 1270, 1778, 2308, 2540, 2885, 3556, 4039, 4445, 4616, 5080, 5770, 7112, 8078, 8890, 11540, 16156, 17780, 20195, 23080, 32312, 35560, 40390, 73279, 80780, 146558, 161560, 293116, 366395, 512953, 586232, 732790, 1025906, 1465580, 2051812, 2564765, 2931160, 4103624, 5129530, 10259060, 20518120]

約数ペア:

[(1, 20518120), (2, 10259060), (4, 5129530), (5, 4103624), (7, 2931160), (8, 2564765), (10, 2051812), (14, 1465580), (20, 1025906), (28, 732790), (35, 586232), (40, 512953), (56, 366395), (70, 293116), (127, 161560), (140, 146558), (254, 80780), (280, 73279), (508, 40390), (577, 35560), (635, 32312), (889, 23080), (1016, 20195), (1154, 17780), (1270, 16156), (1778, 11540), (2308, 8890), (2540, 8078), (2885, 7112), (3556, 5770), (4039, 5080), (4445, 4616)]