80401640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{359}}^1\times {\mathrm{509}}^1$

素因数の和:890

約数の個数: 64

約数和(自身を含む): 198288000

約数和(自身を除く): 117886360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 359, 440, 509, 718, 1018, 1436, 1795, 2036, 2545, 2872, 3590, 3949, 4072, 5090, 5599, 7180, 7898, 10180, 11198, 14360, 15796, 19745, 20360, 22396, 27995, 31592, 39490, 44792, 55990, 78980, 111980, 157960, 182731, 223960, 365462, 730924, 913655, 1461848, 1827310, 2010041, 3654620, 4020082, 7309240, 8040164, 10050205, 16080328, 20100410, 40200820, 80401640]

約数ペア:

[(1, 80401640), (2, 40200820), (4, 20100410), (5, 16080328), (8, 10050205), (10, 8040164), (11, 7309240), (20, 4020082), (22, 3654620), (40, 2010041), (44, 1827310), (55, 1461848), (88, 913655), (110, 730924), (220, 365462), (359, 223960), (440, 182731), (509, 157960), (718, 111980), (1018, 78980), (1436, 55990), (1795, 44792), (2036, 39490), (2545, 31592), (2872, 27995), (3590, 22396), (3949, 20360), (4072, 19745), (5090, 15796), (5599, 14360), (7180, 11198), (7898, 10180)]