21098567

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{193}}^1$

素因数の和:327

約数の個数: 24

約数和(自身を含む): 26008416

約数和(自身を除く): 4909849

約数列:

[1, 7, 23, 49, 97, 161, 193, 679, 1127, 1351, 2231, 4439, 4753, 9457, 15617, 18721, 31073, 109319, 131047, 217511, 430583, 917329, 3014081, 21098567]

約数ペア:

[(1, 21098567), (7, 3014081), (23, 917329), (49, 430583), (97, 217511), (161, 131047), (193, 109319), (679, 31073), (1127, 18721), (1351, 15617), (2231, 9457), (4439, 4753)]