21258040

素因数分解:

$2^3\times 5^1\times {\mathrm{179}}^1\times {\mathrm{2969}}^1$

素因数の和:3159

約数の個数: 32

約数和(自身を含む): 48114000

約数和(自身を除く): 26855960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 179, 358, 716, 895, 1432, 1790, 2969, 3580, 5938, 7160, 11876, 14845, 23752, 29690, 59380, 118760, 531451, 1062902, 2125804, 2657255, 4251608, 5314510, 10629020, 21258040]

約数ペア:

[(1, 21258040), (2, 10629020), (4, 5314510), (5, 4251608), (8, 2657255), (10, 2125804), (20, 1062902), (40, 531451), (179, 118760), (358, 59380), (716, 29690), (895, 23752), (1432, 14845), (1790, 11876), (2969, 7160), (3580, 5938)]