16220840

素因数分解:

$2^3\times 5^1\times {\mathrm{405521}}^1$

素因数の和:405532

約数の個数: 16

約数和(自身を含む): 36496980

約数和(自身を除く): 20276140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 405521, 811042, 1622084, 2027605, 3244168, 4055210, 8110420, 16220840]

約数ペア:

[(1, 16220840), (2, 8110420), (4, 4055210), (5, 3244168), (8, 2027605), (10, 1622084), (20, 811042), (40, 405521)]