21581007

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{991}}^1$

素因数の和:1079

約数の個数: 32

約数和(自身を含む): 35426304

約数和(自身を除く): 13845297

約数列:

[1, 3, 7, 17, 21, 51, 61, 119, 183, 357, 427, 991, 1037, 1281, 2973, 3111, 6937, 7259, 16847, 20811, 21777, 50541, 60451, 117929, 181353, 353787, 423157, 1027667, 1269471, 3083001, 7193669, 21581007]

約数ペア:

[(1, 21581007), (3, 7193669), (7, 3083001), (17, 1269471), (21, 1027667), (51, 423157), (61, 353787), (119, 181353), (183, 117929), (357, 60451), (427, 50541), (991, 21777), (1037, 20811), (1281, 16847), (2973, 7259), (3111, 6937)]