20684785

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{5297}}^1$

素因数の和:5384

約数の個数: 16

約数和(自身を含む): 27464832

約数和(自身を除く): 6780047

約数列:

[1, 5, 11, 55, 71, 355, 781, 3905, 5297, 26485, 58267, 291335, 376087, 1880435, 4136957, 20684785]

約数ペア:

[(1, 20684785), (5, 4136957), (11, 1880435), (55, 376087), (71, 291335), (355, 58267), (781, 26485), (3905, 5297)]