21720609

素因数分解:

$3^3\times {\mathrm{541}}^1\times {\mathrm{1487}}^1$

素因数の和:2037

約数の個数: 16

約数和(自身を含む): 32259840

約数和(自身を除く): 10539231

約数列:

[1, 3, 9, 27, 541, 1487, 1623, 4461, 4869, 13383, 14607, 40149, 804467, 2413401, 7240203, 21720609]

約数ペア:

[(1, 21720609), (3, 7240203), (9, 2413401), (27, 804467), (541, 40149), (1487, 14607), (1623, 13383), (4461, 4869)]