20275857

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{1999}}^1$

素因数の和:2042

約数の個数: 36

約数和(自身を含む): 35568000

約数和(自身を除く): 15292143

約数列:

[1, 3, 7, 9, 21, 23, 49, 63, 69, 147, 161, 207, 441, 483, 1127, 1449, 1999, 3381, 5997, 10143, 13993, 17991, 41979, 45977, 97951, 125937, 137931, 293853, 321839, 413793, 881559, 965517, 2252873, 2896551, 6758619, 20275857]

約数ペア:

[(1, 20275857), (3, 6758619), (7, 2896551), (9, 2252873), (21, 965517), (23, 881559), (49, 413793), (63, 321839), (69, 293853), (147, 137931), (161, 125937), (207, 97951), (441, 45977), (483, 41979), (1127, 17991), (1449, 13993), (1999, 10143), (3381, 5997)]