12821080

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1277}}^1$

素因数の和:1539

約数の個数: 32

約数和(自身を含む): 28985040

約数和(自身を除く): 16163960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 1277, 2008, 2510, 2554, 5020, 5108, 6385, 10040, 10216, 12770, 25540, 51080, 320527, 641054, 1282108, 1602635, 2564216, 3205270, 6410540, 12821080]

約数ペア:

[(1, 12821080), (2, 6410540), (4, 3205270), (5, 2564216), (8, 1602635), (10, 1282108), (20, 641054), (40, 320527), (251, 51080), (502, 25540), (1004, 12770), (1255, 10216), (1277, 10040), (2008, 6385), (2510, 5108), (2554, 5020)]