20423720

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5737}}^1$

素因数の和:5837

約数の個数: 32

約数和(自身を含む): 46477800

約数和(自身を除く): 26054080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5737, 11474, 22948, 28685, 45896, 57370, 114740, 229480, 510593, 1021186, 2042372, 2552965, 4084744, 5105930, 10211860, 20423720]

約数ペア:

[(1, 20423720), (2, 10211860), (4, 5105930), (5, 4084744), (8, 2552965), (10, 2042372), (20, 1021186), (40, 510593), (89, 229480), (178, 114740), (356, 57370), (445, 45896), (712, 28685), (890, 22948), (1780, 11474), (3560, 5737)]