20896280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12149}}^1$

素因数の和:12203

約数の個数: 32

約数和(自身を含む): 48114000

約数和(自身を除く): 27217720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12149, 24298, 48596, 60745, 97192, 121490, 242980, 485960, 522407, 1044814, 2089628, 2612035, 4179256, 5224070, 10448140, 20896280]

約数ペア:

[(1, 20896280), (2, 10448140), (4, 5224070), (5, 4179256), (8, 2612035), (10, 2089628), (20, 1044814), (40, 522407), (43, 485960), (86, 242980), (172, 121490), (215, 97192), (344, 60745), (430, 48596), (860, 24298), (1720, 12149)]