20884591

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1$

素因数の和:343

約数の個数: 32

約数和(自身を含む): 27740160

約数和(自身を除く): 6855569

約数列:

[1, 7, 13, 19, 47, 91, 133, 247, 257, 329, 611, 893, 1729, 1799, 3341, 4277, 4883, 6251, 11609, 12079, 23387, 34181, 63479, 81263, 84553, 157027, 229501, 444353, 1099189, 1606507, 2983513, 20884591]

約数ペア:

[(1, 20884591), (7, 2983513), (13, 1606507), (19, 1099189), (47, 444353), (91, 229501), (133, 157027), (247, 84553), (257, 81263), (329, 63479), (611, 34181), (893, 23387), (1729, 12079), (1799, 11609), (3341, 6251), (4277, 4883)]