19997970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{666599}}^1$

素因数の和:666609

約数の個数: 16

約数和(自身を含む): 47995200

約数和(自身を除く): 27997230

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 666599, 1333198, 1999797, 3332995, 3999594, 6665990, 9998985, 19997970]

約数ペア:

[(1, 19997970), (2, 9998985), (3, 6665990), (5, 3999594), (6, 3332995), (10, 1999797), (15, 1333198), (30, 666599)]