21234819

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{421}}^1$

素因数の和:507

約数の個数: 32

約数和(自身を含む): 32085504

約数和(自身を除く): 10850685

約数列:

[1, 3, 17, 23, 43, 51, 69, 129, 391, 421, 731, 989, 1173, 1263, 2193, 2967, 7157, 9683, 16813, 18103, 21471, 29049, 50439, 54309, 164611, 307751, 416369, 493833, 923253, 1249107, 7078273, 21234819]

約数ペア:

[(1, 21234819), (3, 7078273), (17, 1249107), (23, 923253), (43, 493833), (51, 416369), (69, 307751), (129, 164611), (391, 54309), (421, 50439), (731, 29049), (989, 21471), (1173, 18103), (1263, 16813), (2193, 9683), (2967, 7157)]