205171820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{209359}}^1$

素因数の和:209382

約数の個数: 36

約数和(自身を含む): 501207840

約数和(自身を除く): 296036020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 209359, 418718, 837436, 1046795, 1465513, 2093590, 2931026, 4187180, 5862052, 7327565, 10258591, 14655130, 20517182, 29310260, 41034364, 51292955, 102585910, 205171820]

約数ペア:

[(1, 205171820), (2, 102585910), (4, 51292955), (5, 41034364), (7, 29310260), (10, 20517182), (14, 14655130), (20, 10258591), (28, 7327565), (35, 5862052), (49, 4187180), (70, 2931026), (98, 2093590), (140, 1465513), (196, 1046795), (245, 837436), (490, 418718), (980, 209359)]