18390978

素因数分解:

$2^1\times 3^2\times {\mathrm{991}}^1\times {\mathrm{1031}}^1$

素因数の和:2030

約数の個数: 24

約数和(自身を含む): 39926016

約数和(自身を除く): 21535038

約数列:

[1, 2, 3, 6, 9, 18, 991, 1031, 1982, 2062, 2973, 3093, 5946, 6186, 8919, 9279, 17838, 18558, 1021721, 2043442, 3065163, 6130326, 9195489, 18390978]

約数ペア:

[(1, 18390978), (2, 9195489), (3, 6130326), (6, 3065163), (9, 2043442), (18, 1021721), (991, 18558), (1031, 17838), (1982, 9279), (2062, 8919), (2973, 6186), (3093, 5946)]