19748815

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:291

約数の個数: 24

約数和(自身を含む): 25640640

約数和(自身を除く): 5891825

約数列:

[1, 5, 17, 79, 85, 173, 289, 395, 865, 1343, 1445, 2941, 6715, 13667, 14705, 22831, 49997, 68335, 114155, 232339, 249985, 1161695, 3949763, 19748815]

約数ペア:

[(1, 19748815), (5, 3949763), (17, 1161695), (79, 249985), (85, 232339), (173, 114155), (289, 68335), (395, 49997), (865, 22831), (1343, 14705), (1445, 13667), (2941, 6715)]