81121025

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{1171}}^1$

素因数の和:1361

約数の個数: 24

約数和(自身を含む): 107252064

約数和(自身を除く): 26131039

約数列:

[1, 5, 17, 25, 85, 163, 425, 815, 1171, 2771, 4075, 5855, 13855, 19907, 29275, 69275, 99535, 190873, 497675, 954365, 3244841, 4771825, 16224205, 81121025]

約数ペア:

[(1, 81121025), (5, 16224205), (17, 4771825), (25, 3244841), (85, 954365), (163, 497675), (425, 190873), (815, 99535), (1171, 69275), (2771, 29275), (4075, 19907), (5855, 13855)]