21788080

素因数分解:

$2^4\times 5^1\times {\mathrm{272351}}^1$

素因数の和:272364

約数の個数: 20

約数和(自身を含む): 50657472

約数和(自身を除く): 28869392

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272351, 544702, 1089404, 1361755, 2178808, 2723510, 4357616, 5447020, 10894040, 21788080]

約数ペア:

[(1, 21788080), (2, 10894040), (4, 5447020), (5, 4357616), (8, 2723510), (10, 2178808), (16, 1361755), (20, 1089404), (40, 544702), (80, 272351)]