28001379

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{21859}}^1$

素因数の和:21930

約数の個数: 16

約数和(自身を含む): 43370240

約数和(自身を除く): 15368861

約数列:

[1, 3, 7, 21, 61, 183, 427, 1281, 21859, 65577, 153013, 459039, 1333399, 4000197, 9333793, 28001379]

約数ペア:

[(1, 28001379), (3, 9333793), (7, 4000197), (21, 1333399), (61, 459039), (183, 153013), (427, 65577), (1281, 21859)]