20031985

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:241

約数の個数: 32

約数和(自身を含む): 26812800

約数和(自身を除く): 6780815

約数列:

[1, 5, 19, 37, 41, 95, 139, 185, 205, 695, 703, 779, 1517, 2641, 3515, 3895, 5143, 5699, 7585, 13205, 25715, 28495, 28823, 97717, 108281, 144115, 210863, 488585, 541405, 1054315, 4006397, 20031985]

約数ペア:

[(1, 20031985), (5, 4006397), (19, 1054315), (37, 541405), (41, 488585), (95, 210863), (139, 144115), (185, 108281), (205, 97717), (695, 28823), (703, 28495), (779, 25715), (1517, 13205), (2641, 7585), (3515, 5699), (3895, 5143)]