16690480

素因数分解:

$2^4\times 5^1\times {\mathrm{208631}}^1$

素因数の和:208644

約数の個数: 20

約数和(自身を含む): 38805552

約数和(自身を除く): 22115072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 208631, 417262, 834524, 1043155, 1669048, 2086310, 3338096, 4172620, 8345240, 16690480]

約数ペア:

[(1, 16690480), (2, 8345240), (4, 4172620), (5, 3338096), (8, 2086310), (10, 1669048), (16, 1043155), (20, 834524), (40, 417262), (80, 208631)]