18935217

素因数分解:

$3^2\times 7^2\times {\mathrm{42937}}^1$

素因数の和:42957

約数の個数: 18

約数和(自身を含む): 31817058

約数和(自身を除く): 12881841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 42937, 128811, 300559, 386433, 901677, 2103913, 2705031, 6311739, 18935217]

約数ペア:

[(1, 18935217), (3, 6311739), (7, 2705031), (9, 2103913), (21, 901677), (49, 386433), (63, 300559), (147, 128811), (441, 42937)]