81557212

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{97}}^2\times {\mathrm{197}}^1$

素因数の和:406

約数の個数: 36

約数和(自身を含む): 158120424

約数和(自身を除く): 76563212

約数列:

[1, 2, 4, 11, 22, 44, 97, 194, 197, 388, 394, 788, 1067, 2134, 2167, 4268, 4334, 8668, 9409, 18818, 19109, 37636, 38218, 76436, 103499, 206998, 210199, 413996, 420398, 840796, 1853573, 3707146, 7414292, 20389303, 40778606, 81557212]

約数ペア:

[(1, 81557212), (2, 40778606), (4, 20389303), (11, 7414292), (22, 3707146), (44, 1853573), (97, 840796), (194, 420398), (197, 413996), (388, 210199), (394, 206998), (788, 103499), (1067, 76436), (2134, 38218), (2167, 37636), (4268, 19109), (4334, 18818), (8668, 9409)]