217878025

素因数分解:

$5^2\times {\mathrm{127}}^1\times {\mathrm{163}}^1\times {\mathrm{421}}^1$

素因数の和:721

約数の個数: 24

約数和(自身を含む): 274617344

約数和(自身を除く): 56739319

約数列:

[1, 5, 25, 127, 163, 421, 635, 815, 2105, 3175, 4075, 10525, 20701, 53467, 68623, 103505, 267335, 343115, 517525, 1336675, 1715575, 8715121, 43575605, 217878025]

約数ペア:

[(1, 217878025), (5, 43575605), (25, 8715121), (127, 1715575), (163, 1336675), (421, 517525), (635, 343115), (815, 267335), (2105, 103505), (3175, 68623), (4075, 53467), (10525, 20701)]