12961640

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1291}}^1$

素因数の和:1553

約数の個数: 32

約数和(自身を含む): 29302560

約数和(自身を除く): 16340920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 1291, 2008, 2510, 2582, 5020, 5164, 6455, 10040, 10328, 12910, 25820, 51640, 324041, 648082, 1296164, 1620205, 2592328, 3240410, 6480820, 12961640]

約数ペア:

[(1, 12961640), (2, 6480820), (4, 3240410), (5, 2592328), (8, 1620205), (10, 1296164), (20, 648082), (40, 324041), (251, 51640), (502, 25820), (1004, 12910), (1255, 10328), (1291, 10040), (2008, 6455), (2510, 5164), (2582, 5020)]