20780331

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{821}}^1$

素因数の和:907

約数の個数: 32

約数和(自身を含む): 33143040

約数和(自身を除く): 12362709

約数列:

[1, 3, 11, 13, 33, 39, 59, 143, 177, 429, 649, 767, 821, 1947, 2301, 2463, 8437, 9031, 10673, 25311, 27093, 32019, 48439, 117403, 145317, 352209, 532829, 629707, 1598487, 1889121, 6926777, 20780331]

約数ペア:

[(1, 20780331), (3, 6926777), (11, 1889121), (13, 1598487), (33, 629707), (39, 532829), (59, 352209), (143, 145317), (177, 117403), (429, 48439), (649, 32019), (767, 27093), (821, 25311), (1947, 10673), (2301, 9031), (2463, 8437)]