16991751

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{607}}^1$

素因数の和:691

約数の個数: 32

約数和(自身を含む): 27394048

約数和(自身を除く): 10402297

約数列:

[1, 3, 7, 21, 31, 43, 93, 129, 217, 301, 607, 651, 903, 1333, 1821, 3999, 4249, 9331, 12747, 18817, 26101, 27993, 56451, 78303, 131719, 182707, 395157, 548121, 809131, 2427393, 5663917, 16991751]

約数ペア:

[(1, 16991751), (3, 5663917), (7, 2427393), (21, 809131), (31, 548121), (43, 395157), (93, 182707), (129, 131719), (217, 78303), (301, 56451), (607, 27993), (651, 26101), (903, 18817), (1333, 12747), (1821, 9331), (3999, 4249)]