67980025

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{97}}^2$

素因数の和:238

約数の個数: 27

約数和(自身を含む): 90478119

約数和(自身を除く): 22498094

約数列:

[1, 5, 17, 25, 85, 97, 289, 425, 485, 1445, 1649, 2425, 7225, 8245, 9409, 28033, 41225, 47045, 140165, 159953, 235225, 700825, 799765, 2719201, 3998825, 13596005, 67980025]

約数ペア:

[(1, 67980025), (5, 13596005), (17, 3998825), (25, 2719201), (85, 799765), (97, 700825), (289, 235225), (425, 159953), (485, 140165), (1445, 47045), (1649, 41225), (2425, 28033), (7225, 9409)]