20199442280

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2563381}}^1$

素因数の和:2563589

約数の個数: 32

約数和(自身を含む): 45679467240

約数和(自身を除く): 25480024960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 7880, 2563381, 5126762, 10253524, 12816905, 20507048, 25633810, 51267620, 102535240, 504986057, 1009972114, 2019944228, 2524930285, 4039888456, 5049860570, 10099721140, 20199442280]

約数ペア:

[(1, 20199442280), (2, 10099721140), (4, 5049860570), (5, 4039888456), (8, 2524930285), (10, 2019944228), (20, 1009972114), (40, 504986057), (197, 102535240), (394, 51267620), (788, 25633810), (985, 20507048), (1576, 12816905), (1970, 10253524), (3940, 5126762), (7880, 2563381)]