16820840

素因数分解:

$2^3\times 5^1\times {\mathrm{420521}}^1$

素因数の和:420532

約数の個数: 16

約数和(自身を含む): 37846980

約数和(自身を除く): 21026140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 420521, 841042, 1682084, 2102605, 3364168, 4205210, 8410420, 16820840]

約数ペア:

[(1, 16820840), (2, 8410420), (4, 4205210), (5, 3364168), (8, 2102605), (10, 1682084), (20, 841042), (40, 420521)]