19897955

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{51683}}^1$

素因数の和:51706

約数の個数: 16

約数和(自身を含む): 29769984

約数和(自身を除く): 9872029

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 51683, 258415, 361781, 568513, 1808905, 2842565, 3979591, 19897955]

約数ペア:

[(1, 19897955), (5, 3979591), (7, 2842565), (11, 1808905), (35, 568513), (55, 361781), (77, 258415), (385, 51683)]