13278265

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{379}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 21833280

約数和(自身を除く): 8555015

約数列:

[1, 5, 7, 11, 13, 35, 49, 55, 65, 77, 91, 143, 245, 379, 385, 455, 539, 637, 715, 1001, 1895, 2653, 2695, 3185, 4169, 4927, 5005, 7007, 13265, 18571, 20845, 24635, 29183, 34489, 35035, 54197, 92855, 145915, 172445, 204281, 241423, 270985, 379379, 1021405, 1207115, 1896895, 2655653, 13278265]

約数ペア:

[(1, 13278265), (5, 2655653), (7, 1896895), (11, 1207115), (13, 1021405), (35, 379379), (49, 270985), (55, 241423), (65, 204281), (77, 172445), (91, 145915), (143, 92855), (245, 54197), (379, 35035), (385, 34489), (455, 29183), (539, 24635), (637, 20845), (715, 18571), (1001, 13265), (1895, 7007), (2653, 5005), (2695, 4927), (3185, 4169)]