21809991

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{347}}^1$

素因数の和:471

約数の個数: 32

約数和(自身を含む): 34610688

約数和(自身を除く): 12800697

約数列:

[1, 3, 7, 21, 41, 73, 123, 219, 287, 347, 511, 861, 1041, 1533, 2429, 2993, 7287, 8979, 14227, 20951, 25331, 42681, 62853, 75993, 99589, 177317, 298767, 531951, 1038571, 3115713, 7269997, 21809991]

約数ペア:

[(1, 21809991), (3, 7269997), (7, 3115713), (21, 1038571), (41, 531951), (73, 298767), (123, 177317), (219, 99589), (287, 75993), (347, 62853), (511, 42681), (861, 25331), (1041, 20951), (1533, 14227), (2429, 8979), (2993, 7287)]