16405520

素因数分解:

$2^4\times 5^1\times {\mathrm{205069}}^1$

素因数の和:205082

約数の個数: 20

約数和(自身を含む): 38143020

約数和(自身を除く): 21737500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 205069, 410138, 820276, 1025345, 1640552, 2050690, 3281104, 4101380, 8202760, 16405520]

約数ペア:

[(1, 16405520), (2, 8202760), (4, 4101380), (5, 3281104), (8, 2050690), (10, 1640552), (16, 1025345), (20, 820276), (40, 410138), (80, 205069)]