20709351

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:373

約数の個数: 40

約数和(自身を含む): 33907104

約数和(自身を除く): 13197753

約数列:

[1, 3, 9, 13, 27, 39, 71, 81, 117, 213, 277, 351, 639, 831, 923, 1053, 1917, 2493, 2769, 3601, 5751, 7479, 8307, 10803, 19667, 22437, 24921, 32409, 59001, 74763, 97227, 177003, 255671, 291681, 531009, 767013, 1593027, 2301039, 6903117, 20709351]

約数ペア:

[(1, 20709351), (3, 6903117), (9, 2301039), (13, 1593027), (27, 767013), (39, 531009), (71, 291681), (81, 255671), (117, 177003), (213, 97227), (277, 74763), (351, 59001), (639, 32409), (831, 24921), (923, 22437), (1053, 19667), (1917, 10803), (2493, 8307), (2769, 7479), (3601, 5751)]