21957680

素因数分解:

$2^4\times 5^1\times {\mathrm{274471}}^1$

素因数の和:274484

約数の個数: 20

約数和(自身を含む): 51051792

約数和(自身を除く): 29094112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274471, 548942, 1097884, 1372355, 2195768, 2744710, 4391536, 5489420, 10978840, 21957680]

約数ペア:

[(1, 21957680), (2, 10978840), (4, 5489420), (5, 4391536), (8, 2744710), (10, 2195768), (16, 1372355), (20, 1097884), (40, 548942), (80, 274471)]