19964

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:65

約数の個数: 24

約数和(自身を含む): 43008

約数和(自身を除く): 23044

約数列:

[1, 2, 4, 7, 14, 23, 28, 31, 46, 62, 92, 124, 161, 217, 322, 434, 644, 713, 868, 1426, 2852, 4991, 9982, 19964]

約数ペア:

[(1, 19964), (2, 9982), (4, 4991), (7, 2852), (14, 1426), (23, 868), (28, 713), (31, 644), (46, 434), (62, 322), (92, 217), (124, 161)]