19657520

素因数分解:

$2^4\times 5^1\times {\mathrm{245719}}^1$

素因数の和:245732

約数の個数: 20

約数和(自身を含む): 45703920

約数和(自身を除く): 26046400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245719, 491438, 982876, 1228595, 1965752, 2457190, 3931504, 4914380, 9828760, 19657520]

約数ペア:

[(1, 19657520), (2, 9828760), (4, 4914380), (5, 3931504), (8, 2457190), (10, 1965752), (16, 1228595), (20, 982876), (40, 491438), (80, 245719)]