18813231

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{173}}^1\times {\mathrm{281}}^1$

素因数の和:503

約数の個数: 24

約数和(自身を含む): 28066896

約数和(自身を除く): 9253665

約数列:

[1, 3, 9, 43, 129, 173, 281, 387, 519, 843, 1557, 2529, 7439, 12083, 22317, 36249, 48613, 66951, 108747, 145839, 437517, 2090359, 6271077, 18813231]

約数ペア:

[(1, 18813231), (3, 6271077), (9, 2090359), (43, 437517), (129, 145839), (173, 108747), (281, 66951), (387, 48613), (519, 36249), (843, 22317), (1557, 12083), (2529, 7439)]