21609190

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1999}}^1$

素因数の和:2076

約数の個数: 32

約数和(自身を含む): 41472000

約数和(自身を除く): 19862810

約数列:

[1, 2, 5, 10, 23, 46, 47, 94, 115, 230, 235, 470, 1081, 1999, 2162, 3998, 5405, 9995, 10810, 19990, 45977, 91954, 93953, 187906, 229885, 459770, 469765, 939530, 2160919, 4321838, 10804595, 21609190]

約数ペア:

[(1, 21609190), (2, 10804595), (5, 4321838), (10, 2160919), (23, 939530), (46, 469765), (47, 459770), (94, 229885), (115, 187906), (230, 93953), (235, 91954), (470, 45977), (1081, 19990), (1999, 10810), (2162, 9995), (3998, 5405)]