21166781

素因数分解:

${\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:316

約数の個数: 16

約数和(自身を含む): 22680000

約数和(自身を除く): 1513219

約数列:

[1, 29, 59, 89, 139, 1711, 2581, 4031, 5251, 8201, 12371, 152279, 237829, 358759, 729889, 21166781]

約数ペア:

[(1, 21166781), (29, 729889), (59, 358759), (89, 237829), (139, 152279), (1711, 12371), (2581, 8201), (4031, 5251)]