21968804

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{199}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 45628800

約数和(自身を除く): 23659996

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 143, 193, 199, 286, 386, 398, 572, 772, 796, 2123, 2189, 2509, 2587, 4246, 4378, 5018, 5174, 8492, 8756, 10036, 10348, 27599, 28457, 38407, 55198, 56914, 76814, 110396, 113828, 153628, 422477, 499291, 844954, 998582, 1689908, 1997164, 5492201, 10984402, 21968804]

約数ペア:

[(1, 21968804), (2, 10984402), (4, 5492201), (11, 1997164), (13, 1689908), (22, 998582), (26, 844954), (44, 499291), (52, 422477), (143, 153628), (193, 113828), (199, 110396), (286, 76814), (386, 56914), (398, 55198), (572, 38407), (772, 28457), (796, 27599), (2123, 10348), (2189, 10036), (2509, 8756), (2587, 8492), (4246, 5174), (4378, 5018)]