20885960

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12143}}^1$

素因数の和:12197

約数の個数: 32

約数和(自身を含む): 48090240

約数和(自身を除く): 27204280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12143, 24286, 48572, 60715, 97144, 121430, 242860, 485720, 522149, 1044298, 2088596, 2610745, 4177192, 5221490, 10442980, 20885960]

約数ペア:

[(1, 20885960), (2, 10442980), (4, 5221490), (5, 4177192), (8, 2610745), (10, 2088596), (20, 1044298), (40, 522149), (43, 485720), (86, 242860), (172, 121430), (215, 97144), (344, 60715), (430, 48572), (860, 24286), (1720, 12143)]