21177279

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{1979}}^1$

素因数の和:2055

約数の個数: 24

約数和(自身を含む): 32432400

約数和(自身を除く): 11255121

約数列:

[1, 3, 9, 29, 41, 87, 123, 261, 369, 1189, 1979, 3567, 5937, 10701, 17811, 57391, 81139, 172173, 243417, 516519, 730251, 2353031, 7059093, 21177279]

約数ペア:

[(1, 21177279), (3, 7059093), (9, 2353031), (29, 730251), (41, 516519), (87, 243417), (123, 172173), (261, 81139), (369, 57391), (1189, 17811), (1979, 10701), (3567, 5937)]