81211557

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{63397}}^1$

素因数の和:63468

約数の個数: 16

約数和(自身を含む): 125781632

約数和(自身を除く): 44570075

約数列:

[1, 3, 7, 21, 61, 183, 427, 1281, 63397, 190191, 443779, 1331337, 3867217, 11601651, 27070519, 81211557]

約数ペア:

[(1, 81211557), (3, 27070519), (7, 11601651), (21, 3867217), (61, 1331337), (183, 443779), (427, 190191), (1281, 63397)]