21840105

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{208001}}^1$

素因数の和:208016

約数の個数: 16

約数和(自身を含む): 39936384

約数和(自身を除く): 18096279

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 208001, 624003, 1040005, 1456007, 3120015, 4368021, 7280035, 21840105]

約数ペア:

[(1, 21840105), (3, 7280035), (5, 4368021), (7, 3120015), (15, 1456007), (21, 1040005), (35, 624003), (105, 208001)]