21543387

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 31477248

約数和(自身を除く): 9933861

約数列:

[1, 3, 23, 43, 53, 69, 129, 137, 159, 411, 989, 1219, 2279, 2967, 3151, 3657, 5891, 6837, 7261, 9453, 17673, 21783, 52417, 135493, 157251, 167003, 312223, 406479, 501009, 936669, 7181129, 21543387]

約数ペア:

[(1, 21543387), (3, 7181129), (23, 936669), (43, 501009), (53, 406479), (69, 312223), (129, 167003), (137, 157251), (159, 135493), (411, 52417), (989, 21783), (1219, 17673), (2279, 9453), (2967, 7261), (3151, 6837), (3657, 5891)]