78660280

素因数分解:

$2^3\times 5^1\times {\mathrm{1966507}}^1$

素因数の和:1966518

約数の個数: 16

約数和(自身を含む): 176985720

約数和(自身を除く): 98325440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1966507, 3933014, 7866028, 9832535, 15732056, 19665070, 39330140, 78660280]

約数ペア:

[(1, 78660280), (2, 39330140), (4, 19665070), (5, 15732056), (8, 9832535), (10, 7866028), (20, 3933014), (40, 1966507)]