20782307

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 27095040

約数和(自身を除く): 6312733

約数列:

[1, 7, 13, 31, 53, 91, 139, 217, 371, 403, 689, 973, 1643, 1807, 2821, 4309, 4823, 7367, 11501, 12649, 21359, 30163, 51569, 56017, 95771, 149513, 228377, 392119, 670397, 1598639, 2968901, 20782307]

約数ペア:

[(1, 20782307), (7, 2968901), (13, 1598639), (31, 670397), (53, 392119), (91, 228377), (139, 149513), (217, 95771), (371, 56017), (403, 51569), (689, 30163), (973, 21359), (1643, 12649), (1807, 11501), (2821, 7367), (4309, 4823)]