78840280

素因数分解:

$2^3\times 5^1\times {\mathrm{1971007}}^1$

素因数の和:1971018

約数の個数: 16

約数和(自身を含む): 177390720

約数和(自身を除く): 98550440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1971007, 3942014, 7884028, 9855035, 15768056, 19710070, 39420140, 78840280]

約数ペア:

[(1, 78840280), (2, 39420140), (4, 19710070), (5, 15768056), (8, 9855035), (10, 7884028), (20, 3942014), (40, 1971007)]