81665342

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1\times {\mathrm{499}}^1$

素因数の和:728

約数の個数: 32

約数和(自身を含む): 137808000

約数和(自身を除く): 56142658

約数列:

[1, 2, 11, 22, 43, 86, 173, 346, 473, 499, 946, 998, 1903, 3806, 5489, 7439, 10978, 14878, 21457, 42914, 81829, 86327, 163658, 172654, 236027, 472054, 949597, 1899194, 3712061, 7424122, 40832671, 81665342]

約数ペア:

[(1, 81665342), (2, 40832671), (11, 7424122), (22, 3712061), (43, 1899194), (86, 949597), (173, 472054), (346, 236027), (473, 172654), (499, 163658), (946, 86327), (998, 81829), (1903, 42914), (3806, 21457), (5489, 14878), (7439, 10978)]