20399970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{679999}}^1$

素因数の和:680009

約数の個数: 16

約数和(自身を含む): 48960000

約数和(自身を除く): 28560030

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 679999, 1359998, 2039997, 3399995, 4079994, 6799990, 10199985, 20399970]

約数ペア:

[(1, 20399970), (2, 10199985), (3, 6799990), (5, 4079994), (6, 3399995), (10, 2039997), (15, 1359998), (30, 679999)]