20807900

素因数分解:

$2^2\times 5^2\times {\mathrm{251}}^1\times {\mathrm{829}}^1$

素因数の和:1094

約数の個数: 36

約数和(自身を含む): 45387720

約数和(自身を除く): 24579820

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 251, 502, 829, 1004, 1255, 1658, 2510, 3316, 4145, 5020, 6275, 8290, 12550, 16580, 20725, 25100, 41450, 82900, 208079, 416158, 832316, 1040395, 2080790, 4161580, 5201975, 10403950, 20807900]

約数ペア:

[(1, 20807900), (2, 10403950), (4, 5201975), (5, 4161580), (10, 2080790), (20, 1040395), (25, 832316), (50, 416158), (100, 208079), (251, 82900), (502, 41450), (829, 25100), (1004, 20725), (1255, 16580), (1658, 12550), (2510, 8290), (3316, 6275), (4145, 5020)]