81813775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{1181}}^1$

素因数の和:1371

約数の個数: 24

約数和(自身を含む): 108167184

約数和(自身を除く): 26353409

約数列:

[1, 5, 17, 25, 85, 163, 425, 815, 1181, 2771, 4075, 5905, 13855, 20077, 29525, 69275, 100385, 192503, 501925, 962515, 3272551, 4812575, 16362755, 81813775]

約数ペア:

[(1, 81813775), (5, 16362755), (17, 4812575), (25, 3272551), (85, 962515), (163, 501925), (425, 192503), (815, 100385), (1181, 69275), (2771, 29525), (4075, 20077), (5905, 13855)]