21826220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{661}}^1$

素因数の和:810

約数の個数: 48

約数和(自身を含む): 49824768

約数和(自身を除く): 27998548

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 127, 130, 254, 260, 508, 635, 661, 1270, 1322, 1651, 2540, 2644, 3302, 3305, 6604, 6610, 8255, 8593, 13220, 16510, 17186, 33020, 34372, 42965, 83947, 85930, 167894, 171860, 335788, 419735, 839470, 1091311, 1678940, 2182622, 4365244, 5456555, 10913110, 21826220]

約数ペア:

[(1, 21826220), (2, 10913110), (4, 5456555), (5, 4365244), (10, 2182622), (13, 1678940), (20, 1091311), (26, 839470), (52, 419735), (65, 335788), (127, 171860), (130, 167894), (254, 85930), (260, 83947), (508, 42965), (635, 34372), (661, 33020), (1270, 17186), (1322, 16510), (1651, 13220), (2540, 8593), (2644, 8255), (3302, 6610), (3305, 6604)]