78472720

素因数分解:

$2^4\times 5^1\times {\mathrm{980909}}^1$

素因数の和:980922

約数の個数: 20

約数和(自身を含む): 182449260

約数和(自身を除く): 103976540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 980909, 1961818, 3923636, 4904545, 7847272, 9809090, 15694544, 19618180, 39236360, 78472720]

約数ペア:

[(1, 78472720), (2, 39236360), (4, 19618180), (5, 15694544), (8, 9809090), (10, 7847272), (16, 4904545), (20, 3923636), (40, 1961818), (80, 980909)]