21740156

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{641}}^1$

素因数の和:845

約数の個数: 24

約数和(自身を含む): 39007920

約数和(自身を除く): 17267764

約数列:

[1, 2, 4, 61, 122, 139, 244, 278, 556, 641, 1282, 2564, 8479, 16958, 33916, 39101, 78202, 89099, 156404, 178198, 356396, 5435039, 10870078, 21740156]

約数ペア:

[(1, 21740156), (2, 10870078), (4, 5435039), (61, 356396), (122, 178198), (139, 156404), (244, 89099), (278, 78202), (556, 39101), (641, 33916), (1282, 16958), (2564, 8479)]