20784100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{10939}}^1$

素因数の和:10972

約数の個数: 36

約数和(自身を含む): 47479600

約数和(自身を除く): 26695500

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 380, 475, 950, 1900, 10939, 21878, 43756, 54695, 109390, 207841, 218780, 273475, 415682, 546950, 831364, 1039205, 1093900, 2078410, 4156820, 5196025, 10392050, 20784100]

約数ペア:

[(1, 20784100), (2, 10392050), (4, 5196025), (5, 4156820), (10, 2078410), (19, 1093900), (20, 1039205), (25, 831364), (38, 546950), (50, 415682), (76, 273475), (95, 218780), (100, 207841), (190, 109390), (380, 54695), (475, 43756), (950, 21878), (1900, 10939)]