28812189

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{72211}}^1$

素因数の和:72240

約数の個数: 16

約数和(自身を含む): 46215680

約数和(自身を除く): 17403491

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 72211, 216633, 505477, 1372009, 1516431, 4116027, 9604063, 28812189]

約数ペア:

[(1, 28812189), (3, 9604063), (7, 4116027), (19, 1516431), (21, 1372009), (57, 505477), (133, 216633), (399, 72211)]