21805240

素因数分解:

$2^3\times 5^1\times {\mathrm{545131}}^1$

素因数の和:545142

約数の個数: 16

約数和(自身を含む): 49061880

約数和(自身を除く): 27256640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 545131, 1090262, 2180524, 2725655, 4361048, 5451310, 10902620, 21805240]

約数ペア:

[(1, 21805240), (2, 10902620), (4, 5451310), (5, 4361048), (8, 2725655), (10, 2180524), (20, 1090262), (40, 545131)]