21079721

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2753}}^1$

素因数の和:2816

約数の個数: 16

約数和(自身を含む): 24675840

約数和(自身を除く): 3596119

約数列:

[1, 13, 19, 31, 247, 403, 589, 2753, 7657, 35789, 52307, 85343, 679991, 1109459, 1621517, 21079721]

約数ペア:

[(1, 21079721), (13, 1621517), (19, 1109459), (31, 679991), (247, 85343), (403, 52307), (589, 35789), (2753, 7657)]