19783309

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{2389}}^1$

素因数の和:2429

約数の個数: 18

約数和(自身を含む): 24930090

約数和(自身を除く): 5146781

約数列:

[1, 7, 13, 49, 91, 169, 637, 1183, 2389, 8281, 16723, 31057, 117061, 217399, 403741, 1521793, 2826187, 19783309]

約数ペア:

[(1, 19783309), (7, 2826187), (13, 1521793), (49, 403741), (91, 217399), (169, 117061), (637, 31057), (1183, 16723), (2389, 8281)]