20782881

素因数分解:

$3^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{4519}}^1$

素因数の和:4605

約数の個数: 24

約数和(自身を含む): 34785920

約数和(自身を除く): 14003039

約数列:

[1, 3, 7, 9, 21, 63, 73, 219, 511, 657, 1533, 4519, 4599, 13557, 31633, 40671, 94899, 284697, 329887, 989661, 2309209, 2968983, 6927627, 20782881]

約数ペア:

[(1, 20782881), (3, 6927627), (7, 2968983), (9, 2309209), (21, 989661), (63, 329887), (73, 284697), (219, 94899), (511, 40671), (657, 31633), (1533, 13557), (4519, 4599)]