81543760

素因数分解:

$2^4\times 5^1\times {\mathrm{1019297}}^1$

素因数の和:1019310

約数の個数: 20

約数和(自身を含む): 189589428

約数和(自身を除く): 108045668

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1019297, 2038594, 4077188, 5096485, 8154376, 10192970, 16308752, 20385940, 40771880, 81543760]

約数ペア:

[(1, 81543760), (2, 40771880), (4, 20385940), (5, 16308752), (8, 10192970), (10, 8154376), (16, 5096485), (20, 4077188), (40, 2038594), (80, 1019297)]