21003702921

素因数分解:

$3^3\times {\mathrm{191}}^1\times {\mathrm{4072853}}^1$

素因数の和:4073053

約数の個数: 16

約数和(自身を含む): 31279518720

約数和(自身を除く): 10275815799

約数列:

[1, 3, 9, 27, 191, 573, 1719, 5157, 4072853, 12218559, 36655677, 109967031, 777914923, 2333744769, 7001234307, 21003702921]

約数ペア:

[(1, 21003702921), (3, 7001234307), (9, 2333744769), (27, 777914923), (191, 109967031), (573, 36655677), (1719, 12218559), (5157, 4072853)]