21398237

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{349}}^1\times {\mathrm{461}}^1$

素因数の和:836

約数の個数: 16

約数和(自身を含む): 25872000

約数和(自身を除く): 4473763

約数列:

[1, 7, 19, 133, 349, 461, 2443, 3227, 6631, 8759, 46417, 61313, 160889, 1126223, 3056891, 21398237]

約数ペア:

[(1, 21398237), (7, 3056891), (19, 1126223), (133, 160889), (349, 61313), (461, 46417), (2443, 8759), (3227, 6631)]