21716891

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{191}}^1\times {\mathrm{439}}^1$

素因数の和:674

約数の個数: 16

約数和(自身を含む): 25681920

約数和(自身を除く): 3965029

約数列:

[1, 7, 37, 191, 259, 439, 1337, 3073, 7067, 16243, 49469, 83849, 113701, 586943, 3102413, 21716891]

約数ペア:

[(1, 21716891), (7, 3102413), (37, 586943), (191, 113701), (259, 83849), (439, 49469), (1337, 16243), (3073, 7067)]