20581460

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{103}}^2$

素因数の和:312

約数の個数: 36

約数和(自身を含む): 44094708

約数和(自身を除く): 23513248

約数列:

[1, 2, 4, 5, 10, 20, 97, 103, 194, 206, 388, 412, 485, 515, 970, 1030, 1940, 2060, 9991, 10609, 19982, 21218, 39964, 42436, 49955, 53045, 99910, 106090, 199820, 212180, 1029073, 2058146, 4116292, 5145365, 10290730, 20581460]

約数ペア:

[(1, 20581460), (2, 10290730), (4, 5145365), (5, 4116292), (10, 2058146), (20, 1029073), (97, 212180), (103, 199820), (194, 106090), (206, 99910), (388, 53045), (412, 49955), (485, 42436), (515, 39964), (970, 21218), (1030, 19982), (1940, 10609), (2060, 9991)]