21228779

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2801}}^1$

素因数の和:2878

約数の個数: 16

約数和(自身を含む): 25419744

約数和(自身を除く): 4190965

約数列:

[1, 11, 13, 53, 143, 583, 689, 2801, 7579, 30811, 36413, 148453, 400543, 1632983, 1929889, 21228779]

約数ペア:

[(1, 21228779), (11, 1929889), (13, 1632983), (53, 400543), (143, 148453), (583, 36413), (689, 30811), (2801, 7579)]