21487865

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{26693}}^1$

素因数の和:26728

約数の個数: 16

約数和(自身を含む): 30751488

約数和(自身を除く): 9263623

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 26693, 133465, 186851, 613939, 934255, 3069695, 4297573, 21487865]

約数ペア:

[(1, 21487865), (5, 4297573), (7, 3069695), (23, 934255), (35, 613939), (115, 186851), (161, 133465), (805, 26693)]