21995365

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{5281}}^1$

素因数の和:5317

約数の個数: 24

約数和(自身を含む): 32515992

約数和(自身を除く): 10520627

約数列:

[1, 5, 7, 17, 35, 49, 85, 119, 245, 595, 833, 4165, 5281, 26405, 36967, 89777, 184835, 258769, 448885, 628439, 1293845, 3142195, 4399073, 21995365]

約数ペア:

[(1, 21995365), (5, 4399073), (7, 3142195), (17, 1293845), (35, 628439), (49, 448885), (85, 258769), (119, 184835), (245, 89777), (595, 36967), (833, 26405), (4165, 5281)]