998991

素因数分解:

$3^2\times 7^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:271

約数の個数: 24

約数和(自身を含む): 1676064

約数和(自身を除く): 677073

約数列:

[1, 3, 7, 9, 21, 63, 101, 157, 303, 471, 707, 909, 1099, 1413, 2121, 3297, 6363, 9891, 15857, 47571, 110999, 142713, 332997, 998991]

約数ペア:

[(1, 998991), (3, 332997), (7, 142713), (9, 110999), (21, 47571), (63, 15857), (101, 9891), (157, 6363), (303, 3297), (471, 2121), (707, 1413), (909, 1099)]