21541247

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:303

約数の個数: 24

約数和(自身を含む): 27054720

約数和(自身を除く): 5513473

約数列:

[1, 7, 13, 91, 131, 139, 169, 917, 973, 1183, 1703, 1807, 11921, 12649, 18209, 22139, 23491, 127463, 154973, 164437, 236717, 1657019, 3077321, 21541247]

約数ペア:

[(1, 21541247), (7, 3077321), (13, 1657019), (91, 236717), (131, 164437), (139, 154973), (169, 127463), (917, 23491), (973, 22139), (1183, 18209), (1703, 12649), (1807, 11921)]