28118769

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{18859}}^1$

素因数の和:18940

約数の個数: 16

約数和(自身を含む): 43453440

約数和(自身を除く): 15334671

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 18859, 56577, 132013, 396039, 1338989, 4016967, 9372923, 28118769]

約数ペア:

[(1, 28118769), (3, 9372923), (7, 4016967), (21, 1338989), (71, 396039), (213, 132013), (497, 56577), (1491, 18859)]