638210990

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{717091}}^1$

素因数の和:717187

約数の個数: 16

約数和(自身を含む): 1161689040

約数和(自身を除く): 523478050

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 717091, 1434182, 3585455, 7170910, 63821099, 127642198, 319105495, 638210990]

約数ペア:

[(1, 638210990), (2, 319105495), (5, 127642198), (10, 63821099), (89, 7170910), (178, 3585455), (445, 1434182), (890, 717091)]