19988529

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{5557}}^1$

素因数の和:5680

約数の個数: 16

約数和(自身を含む): 29346240

約数和(自身を除く): 9357711

約数列:

[1, 3, 11, 33, 109, 327, 1199, 3597, 5557, 16671, 61127, 183381, 605713, 1817139, 6662843, 19988529]

約数ペア:

[(1, 19988529), (3, 6662843), (11, 1817139), (33, 605713), (109, 183381), (327, 61127), (1199, 16671), (3597, 5557)]