78457520

素因数分解:

$2^4\times 5^1\times {\mathrm{980719}}^1$

素因数の和:980732

約数の個数: 20

約数和(自身を含む): 182413920

約数和(自身を除く): 103956400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 980719, 1961438, 3922876, 4903595, 7845752, 9807190, 15691504, 19614380, 39228760, 78457520]

約数ペア:

[(1, 78457520), (2, 39228760), (4, 19614380), (5, 15691504), (8, 9807190), (10, 7845752), (16, 4903595), (20, 3922876), (40, 1961438), (80, 980719)]