21104080

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1051}}^1$

素因数の和:1315

約数の個数: 40

約数和(自身を含む): 49309344

約数和(自身を除く): 28205264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1051, 1255, 2008, 2102, 2510, 4016, 4204, 5020, 5255, 8408, 10040, 10510, 16816, 20080, 21020, 42040, 84080, 263801, 527602, 1055204, 1319005, 2110408, 2638010, 4220816, 5276020, 10552040, 21104080]

約数ペア:

[(1, 21104080), (2, 10552040), (4, 5276020), (5, 4220816), (8, 2638010), (10, 2110408), (16, 1319005), (20, 1055204), (40, 527602), (80, 263801), (251, 84080), (502, 42040), (1004, 21020), (1051, 20080), (1255, 16816), (2008, 10510), (2102, 10040), (2510, 8408), (4016, 5255), (4204, 5020)]