20556669

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12391}}^1$

素因数の和:12480

約数の個数: 16

約数和(自身を含む): 31723520

約数和(自身を除く): 11166851

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12391, 37173, 86737, 260211, 978889, 2936667, 6852223, 20556669]

約数ペア:

[(1, 20556669), (3, 6852223), (7, 2936667), (21, 978889), (79, 260211), (237, 86737), (553, 37173), (1659, 12391)]