21537815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{3217}}^1$

素因数の和:3338

約数の個数: 16

約数和(自身を含む): 28112448

約数和(自身を除く): 6574633

約数列:

[1, 5, 13, 65, 103, 515, 1339, 3217, 6695, 16085, 41821, 209105, 331351, 1656755, 4307563, 21537815]

約数ペア:

[(1, 21537815), (5, 4307563), (13, 1656755), (65, 331351), (103, 209105), (515, 41821), (1339, 16085), (3217, 6695)]