18708291

素因数分解:

$3^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1993}}^1$

素因数の和:2155

約数の個数: 24

約数和(自身を含む): 31106400

約数和(自身を除く): 12398109

約数列:

[1, 3, 7, 9, 21, 63, 149, 447, 1043, 1341, 1993, 3129, 5979, 9387, 13951, 17937, 41853, 125559, 296957, 890871, 2078699, 2672613, 6236097, 18708291]

約数ペア:

[(1, 18708291), (3, 6236097), (7, 2672613), (9, 2078699), (21, 890871), (63, 296957), (149, 125559), (447, 41853), (1043, 17937), (1341, 13951), (1993, 9387), (3129, 5979)]