20796520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{113}}^1$

素因数の和:274

約数の個数: 64

約数和(自身を含む): 48755520

約数和(自身を除く): 27959000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 107, 113, 172, 214, 215, 226, 344, 428, 430, 452, 535, 565, 856, 860, 904, 1070, 1130, 1720, 2140, 2260, 4280, 4520, 4601, 4859, 9202, 9718, 12091, 18404, 19436, 23005, 24182, 24295, 36808, 38872, 46010, 48364, 48590, 60455, 92020, 96728, 97180, 120910, 184040, 194360, 241820, 483640, 519913, 1039826, 2079652, 2599565, 4159304, 5199130, 10398260, 20796520]

約数ペア:

[(1, 20796520), (2, 10398260), (4, 5199130), (5, 4159304), (8, 2599565), (10, 2079652), (20, 1039826), (40, 519913), (43, 483640), (86, 241820), (107, 194360), (113, 184040), (172, 120910), (214, 97180), (215, 96728), (226, 92020), (344, 60455), (428, 48590), (430, 48364), (452, 46010), (535, 38872), (565, 36808), (856, 24295), (860, 24182), (904, 23005), (1070, 19436), (1130, 18404), (1720, 12091), (2140, 9718), (2260, 9202), (4280, 4859), (4520, 4601)]