20420915

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{4999}}^1$

素因数の和:5066

約数の個数: 16

約数和(自身を含む): 26400000

約数和(自身を除く): 5979085

約数列:

[1, 5, 19, 43, 95, 215, 817, 4085, 4999, 24995, 94981, 214957, 474905, 1074785, 4084183, 20420915]

約数ペア:

[(1, 20420915), (5, 4084183), (19, 1074785), (43, 474905), (95, 214957), (215, 94981), (817, 24995), (4085, 4999)]