16721240

素因数分解:

$2^3\times 5^1\times {\mathrm{418031}}^1$

素因数の和:418042

約数の個数: 16

約数和(自身を含む): 37622880

約数和(自身を除く): 20901640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 418031, 836062, 1672124, 2090155, 3344248, 4180310, 8360620, 16721240]

約数ペア:

[(1, 16721240), (2, 8360620), (4, 4180310), (5, 3344248), (8, 2090155), (10, 1672124), (20, 836062), (40, 418031)]