19957161

素因数分解:

$3^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{1069}}^1$

素因数の和:1213

約数の個数: 24

約数和(自身を含む): 31226880

約数和(自身を除く): 11269719

約数列:

[1, 3, 7, 21, 49, 127, 147, 381, 889, 1069, 2667, 3207, 6223, 7483, 18669, 22449, 52381, 135763, 157143, 407289, 950341, 2851023, 6652387, 19957161]

約数ペア:

[(1, 19957161), (3, 6652387), (7, 2851023), (21, 950341), (49, 407289), (127, 157143), (147, 135763), (381, 52381), (889, 22449), (1069, 18669), (2667, 7483), (3207, 6223)]