21250459

素因数分解:

${\mathrm{17}}^2\times {\mathrm{23}}^2\times {\mathrm{139}}^1$

素因数の和:219

約数の個数: 18

約数和(自身を含む): 23767940

約数和(自身を除く): 2517481

約数列:

[1, 17, 23, 139, 289, 391, 529, 2363, 3197, 6647, 8993, 40171, 54349, 73531, 152881, 923933, 1250027, 21250459]

約数ペア:

[(1, 21250459), (17, 1250027), (23, 923933), (139, 152881), (289, 73531), (391, 54349), (529, 40171), (2363, 8993), (3197, 6647)]