18721953

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{113}}^1\times {\mathrm{449}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 28009800

約数和(自身を除く): 9287847

約数列:

[1, 3, 9, 41, 113, 123, 339, 369, 449, 1017, 1347, 4041, 4633, 13899, 18409, 41697, 50737, 55227, 152211, 165681, 456633, 2080217, 6240651, 18721953]

約数ペア:

[(1, 18721953), (3, 6240651), (9, 2080217), (41, 456633), (113, 165681), (123, 152211), (339, 55227), (369, 50737), (449, 41697), (1017, 18409), (1347, 13899), (4041, 4633)]