19987359

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{55987}}^1$

素因数の和:56014

約数の個数: 16

約数和(自身を含む): 32249088

約数和(自身を除く): 12261729

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 55987, 167961, 391909, 951779, 1175727, 2855337, 6662453, 19987359]

約数ペア:

[(1, 19987359), (3, 6662453), (7, 2855337), (17, 1175727), (21, 951779), (51, 391909), (119, 167961), (357, 55987)]