81601880

素因数分解:

$2^3\times 5^1\times {\mathrm{2040047}}^1$

素因数の和:2040058

約数の個数: 16

約数和(自身を含む): 183604320

約数和(自身を除く): 102002440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2040047, 4080094, 8160188, 10200235, 16320376, 20400470, 40800940, 81601880]

約数ペア:

[(1, 81601880), (2, 40800940), (4, 20400470), (5, 16320376), (8, 10200235), (10, 8160188), (20, 4080094), (40, 2040047)]