20658080

素因数分解:

$2^5\times 5^1\times {\mathrm{129113}}^1$

素因数の和:129128

約数の個数: 24

約数和(自身を含む): 48805092

約数和(自身を除く): 28147012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 129113, 258226, 516452, 645565, 1032904, 1291130, 2065808, 2582260, 4131616, 5164520, 10329040, 20658080]

約数ペア:

[(1, 20658080), (2, 10329040), (4, 5164520), (5, 4131616), (8, 2582260), (10, 2065808), (16, 1291130), (20, 1032904), (32, 645565), (40, 516452), (80, 258226), (160, 129113)]