18978747

素因数分解:

$3^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1\times {\mathrm{757}}^1$

素因数の和:958

約数の個数: 16

約数和(自身を含む): 25941792

約数和(自身を除く): 6963045

約数列:

[1, 3, 61, 137, 183, 411, 757, 2271, 8357, 25071, 46177, 103709, 138531, 311127, 6326249, 18978747]

約数ペア:

[(1, 18978747), (3, 6326249), (61, 311127), (137, 138531), (183, 103709), (411, 46177), (757, 25071), (2271, 8357)]