20806723539

素因数分解:

$3^2\times 7^2\times {\mathrm{223}}^1\times {\mathrm{211573}}^1$

素因数の和:211816

約数の個数: 36

約数和(自身を含む): 35117898816

約数和(自身を除く): 14311175277

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 223, 441, 669, 1561, 2007, 4683, 10927, 14049, 32781, 98343, 211573, 634719, 1481011, 1904157, 4443033, 10367077, 13329099, 31101231, 47180779, 93303693, 141542337, 330265453, 424627011, 990796359, 2311858171, 2972389077, 6935574513, 20806723539]

約数ペア:

[(1, 20806723539), (3, 6935574513), (7, 2972389077), (9, 2311858171), (21, 990796359), (49, 424627011), (63, 330265453), (147, 141542337), (223, 93303693), (441, 47180779), (669, 31101231), (1561, 13329099), (2007, 10367077), (4683, 4443033), (10927, 1904157), (14049, 1481011), (32781, 634719), (98343, 211573)]