18974781

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{863}}^1$

素因数の和:1225

約数の個数: 24

約数和(自身を含む): 31449600

約数和(自身を除く): 12474819

約数列:

[1, 3, 7, 9, 21, 63, 349, 863, 1047, 2443, 2589, 3141, 6041, 7329, 7767, 18123, 21987, 54369, 301187, 903561, 2108309, 2710683, 6324927, 18974781]

約数ペア:

[(1, 18974781), (3, 6324927), (7, 2710683), (9, 2108309), (21, 903561), (63, 301187), (349, 54369), (863, 21987), (1047, 18123), (2443, 7767), (2589, 7329), (3141, 6041)]