21490288

素因数分解:

$2^4\times {\mathrm{131}}^1\times {\mathrm{10253}}^1$

素因数の和:10392

約数の個数: 20

約数和(自身を含む): 41959368

約数和(自身を除く): 20469080

約数列:

[1, 2, 4, 8, 16, 131, 262, 524, 1048, 2096, 10253, 20506, 41012, 82024, 164048, 1343143, 2686286, 5372572, 10745144, 21490288]

約数ペア:

[(1, 21490288), (2, 10745144), (4, 5372572), (8, 2686286), (16, 1343143), (131, 164048), (262, 82024), (524, 41012), (1048, 20506), (2096, 10253)]