21907475

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{2713}}^1$

素因数の和:2759

約数の個数: 24

約数和(自身を含む): 30288240

約数和(自身を除く): 8380765

約数列:

[1, 5, 17, 19, 25, 85, 95, 323, 425, 475, 1615, 2713, 8075, 13565, 46121, 51547, 67825, 230605, 257735, 876299, 1153025, 1288675, 4381495, 21907475]

約数ペア:

[(1, 21907475), (5, 4381495), (17, 1288675), (19, 1153025), (25, 876299), (85, 257735), (95, 230605), (323, 67825), (425, 51547), (475, 46121), (1615, 13565), (2713, 8075)]