20817139

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{239}}^1\times {\mathrm{541}}^1$

素因数の和:810

約数の個数: 16

約数和(自身を含む): 24975360

約数和(自身を除く): 4158221

約数列:

[1, 7, 23, 161, 239, 541, 1673, 3787, 5497, 12443, 38479, 87101, 129299, 905093, 2973877, 20817139]

約数ペア:

[(1, 20817139), (7, 2973877), (23, 905093), (161, 129299), (239, 87101), (541, 38479), (1673, 12443), (3787, 5497)]