21240999

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2557}}^1$

素因数の和:2647

約数の個数: 24

約数和(自身を含む): 33520032

約数和(自身を除く): 12279033

約数列:

[1, 3, 9, 13, 39, 71, 117, 213, 639, 923, 2557, 2769, 7671, 8307, 23013, 33241, 99723, 181547, 299169, 544641, 1633923, 2360111, 7080333, 21240999]

約数ペア:

[(1, 21240999), (3, 7080333), (9, 2360111), (13, 1633923), (39, 544641), (71, 299169), (117, 181547), (213, 99723), (639, 33241), (923, 23013), (2557, 8307), (2769, 7671)]