21302281

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{1637}}^1$

素因数の和:1681

約数の個数: 24

約数和(自身を含む): 28776384

約数和(自身を除く): 7474103

約数列:

[1, 7, 11, 13, 77, 91, 143, 169, 1001, 1183, 1637, 1859, 11459, 13013, 18007, 21281, 126049, 148967, 234091, 276653, 1638637, 1936571, 3043183, 21302281]

約数ペア:

[(1, 21302281), (7, 3043183), (11, 1936571), (13, 1638637), (77, 276653), (91, 234091), (143, 148967), (169, 126049), (1001, 21281), (1183, 18007), (1637, 13013), (1859, 11459)]