20647865

素因数分解:

$5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1187}}^1$

素因数の和:1277

約数の個数: 24

約数和(自身を含む): 29253312

約数和(自身を除く): 8605447

約数列:

[1, 5, 7, 35, 49, 71, 245, 355, 497, 1187, 2485, 3479, 5935, 8309, 17395, 41545, 58163, 84277, 290815, 421385, 589939, 2949695, 4129573, 20647865]

約数ペア:

[(1, 20647865), (5, 4129573), (7, 2949695), (35, 589939), (49, 421385), (71, 290815), (245, 84277), (355, 58163), (497, 41545), (1187, 17395), (2485, 8309), (3479, 5935)]