16402420180

素因数分解:

$2^2\times 5^1\times {\mathrm{820121009}}^1$

素因数の和:820121018

約数の個数: 12

約数和(自身を含む): 34445082420

約数和(自身を除く): 18042662240

約数列:

[1, 2, 4, 5, 10, 20, 820121009, 1640242018, 3280484036, 4100605045, 8201210090, 16402420180]

約数ペア:

[(1, 16402420180), (2, 8201210090), (4, 4100605045), (5, 3280484036), (10, 1640242018), (20, 820121009)]