81091880

素因数分解:

$2^3\times 5^1\times {\mathrm{2027297}}^1$

素因数の和:2027308

約数の個数: 16

約数和(自身を含む): 182456820

約数和(自身を除く): 101364940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2027297, 4054594, 8109188, 10136485, 16218376, 20272970, 40545940, 81091880]

約数ペア:

[(1, 81091880), (2, 40545940), (4, 20272970), (5, 16218376), (8, 10136485), (10, 8109188), (20, 4054594), (40, 2027297)]