19904105

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{2203}}^1$

素因数の和:2360

約数の個数: 16

約数和(自身を含む): 25919040

約数和(自身を除く): 6014935

約数列:

[1, 5, 13, 65, 139, 695, 1807, 2203, 9035, 11015, 28639, 143195, 306217, 1531085, 3980821, 19904105]

約数ペア:

[(1, 19904105), (5, 3980821), (13, 1531085), (65, 306217), (139, 143195), (695, 28639), (1807, 11015), (2203, 9035)]