21291284

素因数分解:

$2^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{4723}}^1$

素因数の和:4764

約数の個数: 36

約数和(自身を含む): 45237024

約数和(自身を除く): 23945740

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 49, 92, 98, 161, 196, 322, 644, 1127, 2254, 4508, 4723, 9446, 18892, 33061, 66122, 108629, 132244, 217258, 231427, 434516, 462854, 760403, 925708, 1520806, 3041612, 5322821, 10645642, 21291284]

約数ペア:

[(1, 21291284), (2, 10645642), (4, 5322821), (7, 3041612), (14, 1520806), (23, 925708), (28, 760403), (46, 462854), (49, 434516), (92, 231427), (98, 217258), (161, 132244), (196, 108629), (322, 66122), (644, 33061), (1127, 18892), (2254, 9446), (4508, 4723)]