19721735

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1$

素因数の和:359

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 7649785

約数列:

[1, 5, 11, 31, 43, 55, 155, 215, 269, 341, 473, 1333, 1345, 1705, 2365, 2959, 6665, 8339, 11567, 14663, 14795, 41695, 57835, 73315, 91729, 127237, 358577, 458645, 636185, 1792885, 3944347, 19721735]

約数ペア:

[(1, 19721735), (5, 3944347), (11, 1792885), (31, 636185), (43, 458645), (55, 358577), (155, 127237), (215, 91729), (269, 73315), (341, 57835), (473, 41695), (1333, 14795), (1345, 14663), (1705, 11567), (2365, 8339), (2959, 6665)]