20885715

素因数分解:

$3^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2179}}^1$

素因数の和:2264

約数の個数: 32

約数和(自身を含む): 37670400

約数和(自身を除く): 16784685

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 135, 213, 355, 639, 1065, 1917, 2179, 3195, 6537, 9585, 10895, 19611, 32685, 58833, 98055, 154709, 294165, 464127, 773545, 1392381, 2320635, 4177143, 6961905, 20885715]

約数ペア:

[(1, 20885715), (3, 6961905), (5, 4177143), (9, 2320635), (15, 1392381), (27, 773545), (45, 464127), (71, 294165), (135, 154709), (213, 98055), (355, 58833), (639, 32685), (1065, 19611), (1917, 10895), (2179, 9585), (3195, 6537)]