80127820

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1\times {\mathrm{401}}^1$

素因数の和:610

約数の個数: 48

約数和(自身を含む): 172081728

約数和(自身を除く): 91953908

約数列:

[1, 2, 4, 5, 10, 20, 97, 103, 194, 206, 388, 401, 412, 485, 515, 802, 970, 1030, 1604, 1940, 2005, 2060, 4010, 8020, 9991, 19982, 38897, 39964, 41303, 49955, 77794, 82606, 99910, 155588, 165212, 194485, 199820, 206515, 388970, 413030, 777940, 826060, 4006391, 8012782, 16025564, 20031955, 40063910, 80127820]

約数ペア:

[(1, 80127820), (2, 40063910), (4, 20031955), (5, 16025564), (10, 8012782), (20, 4006391), (97, 826060), (103, 777940), (194, 413030), (206, 388970), (388, 206515), (401, 199820), (412, 194485), (485, 165212), (515, 155588), (802, 99910), (970, 82606), (1030, 77794), (1604, 49955), (1940, 41303), (2005, 39964), (2060, 38897), (4010, 19982), (8020, 9991)]