19884609

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{7919}}^1$

素因数の和:7962

約数の個数: 20

約数和(自身を含む): 30666240

約数和(自身を除く): 10781631

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 7919, 23757, 71271, 213813, 245489, 641439, 736467, 2209401, 6628203, 19884609]

約数ペア:

[(1, 19884609), (3, 6628203), (9, 2209401), (27, 736467), (31, 641439), (81, 245489), (93, 213813), (279, 71271), (837, 23757), (2511, 7919)]