21491530

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19717}}^1$

素因数の和:19833

約数の個数: 16

約数和(自身を含む): 39041640

約数和(自身を除く): 17550110

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19717, 39434, 98585, 197170, 2149153, 4298306, 10745765, 21491530]

約数ペア:

[(1, 21491530), (2, 10745765), (5, 4298306), (10, 2149153), (109, 197170), (218, 98585), (545, 39434), (1090, 19717)]