18638217

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{661}}^1$

素因数の和:921

約数の個数: 24

約数和(自身を含む): 29157128

約数和(自身を除く): 10518911

約数列:

[1, 3, 9, 13, 39, 117, 241, 661, 723, 1983, 2169, 3133, 5949, 8593, 9399, 25779, 28197, 77337, 159301, 477903, 1433709, 2070913, 6212739, 18638217]

約数ペア:

[(1, 18638217), (3, 6212739), (9, 2070913), (13, 1433709), (39, 477903), (117, 159301), (241, 77337), (661, 28197), (723, 25779), (1983, 9399), (2169, 8593), (3133, 5949)]