21421955

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{5861}}^1$

素因数の和:5926

約数の個数: 16

約数和(自身を含む): 27856224

約数和(自身を除く): 6434269

約数列:

[1, 5, 17, 43, 85, 215, 731, 3655, 5861, 29305, 99637, 252023, 498185, 1260115, 4284391, 21421955]

約数ペア:

[(1, 21421955), (5, 4284391), (17, 1260115), (43, 498185), (85, 252023), (215, 99637), (731, 29305), (3655, 5861)]