28138509

素因数分解:

$3^4\times 7^1\times {\mathrm{49627}}^1$

素因数の和:49646

約数の個数: 20

約数和(自身を含む): 48039904

約数和(自身を除く): 19901395

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 49627, 148881, 347389, 446643, 1042167, 1339929, 3126501, 4019787, 9379503, 28138509]

約数ペア:

[(1, 28138509), (3, 9379503), (7, 4019787), (9, 3126501), (21, 1339929), (27, 1042167), (63, 446643), (81, 347389), (189, 148881), (567, 49627)]