199954520

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{56167}}^1$

素因数の和:56267

約数の個数: 32

約数和(自身を含む): 454960800

約数和(自身を除く): 255006280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 56167, 112334, 224668, 280835, 449336, 561670, 1123340, 2246680, 4998863, 9997726, 19995452, 24994315, 39990904, 49988630, 99977260, 199954520]

約数ペア:

[(1, 199954520), (2, 99977260), (4, 49988630), (5, 39990904), (8, 24994315), (10, 19995452), (20, 9997726), (40, 4998863), (89, 2246680), (178, 1123340), (356, 561670), (445, 449336), (712, 280835), (890, 224668), (1780, 112334), (3560, 56167)]