209983405

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{787}}^1$

素因数の和:925

約数の個数: 32

約数和(自身を含む): 277098624

約数和(自身を除く): 67115219

約数列:

[1, 5, 17, 43, 73, 85, 215, 365, 731, 787, 1241, 3139, 3655, 3935, 6205, 13379, 15695, 33841, 53363, 57451, 66895, 169205, 266815, 287255, 575297, 976667, 2470393, 2876485, 4883335, 12351965, 41996681, 209983405]

約数ペア:

[(1, 209983405), (5, 41996681), (17, 12351965), (43, 4883335), (73, 2876485), (85, 2470393), (215, 976667), (365, 575297), (731, 287255), (787, 266815), (1241, 169205), (3139, 66895), (3655, 57451), (3935, 53363), (6205, 33841), (13379, 15695)]