205124780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{209311}}^1$

素因数の和:209334

約数の個数: 36

約数和(自身を含む): 501092928

約数和(自身を除く): 295968148

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 209311, 418622, 837244, 1046555, 1465177, 2093110, 2930354, 4186220, 5860708, 7325885, 10256239, 14651770, 20512478, 29303540, 41024956, 51281195, 102562390, 205124780]

約数ペア:

[(1, 205124780), (2, 102562390), (4, 51281195), (5, 41024956), (7, 29303540), (10, 20512478), (14, 14651770), (20, 10256239), (28, 7325885), (35, 5860708), (49, 4186220), (70, 2930354), (98, 2093110), (140, 1465177), (196, 1046555), (245, 837244), (490, 418622), (980, 209311)]