18643720

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5237}}^1$

素因数の和:5337

約数の個数: 32

約数和(自身を含む): 42427800

約数和(自身を除く): 23784080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5237, 10474, 20948, 26185, 41896, 52370, 104740, 209480, 466093, 932186, 1864372, 2330465, 3728744, 4660930, 9321860, 18643720]

約数ペア:

[(1, 18643720), (2, 9321860), (4, 4660930), (5, 3728744), (8, 2330465), (10, 1864372), (20, 932186), (40, 466093), (89, 209480), (178, 104740), (356, 52370), (445, 41896), (712, 26185), (890, 20948), (1780, 10474), (3560, 5237)]