21358960720

素因数分解:

$2^4\times 5^1\times {\mathrm{266987009}}^1$

素因数の和:266987022

約数の個数: 20

約数和(自身を含む): 49659583860

約数和(自身を除く): 28300623140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266987009, 533974018, 1067948036, 1334935045, 2135896072, 2669870090, 4271792144, 5339740180, 10679480360, 21358960720]

約数ペア:

[(1, 21358960720), (2, 10679480360), (4, 5339740180), (5, 4271792144), (8, 2669870090), (10, 2135896072), (16, 1334935045), (20, 1067948036), (40, 533974018), (80, 266987009)]