20638135

素因数分解:

$5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{4643}}^1$

素因数の和:4782

約数の個数: 16

約数和(自身を含む): 28532736

約数和(自身を除く): 7894601

約数列:

[1, 5, 7, 35, 127, 635, 889, 4445, 4643, 23215, 32501, 162505, 589661, 2948305, 4127627, 20638135]

約数ペア:

[(1, 20638135), (5, 4127627), (7, 2948305), (35, 589661), (127, 162505), (635, 32501), (889, 23215), (4445, 4643)]