20509983

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{823}}^1$

素因数の和:916

約数の個数: 32

約数和(自身を含む): 33223680

約数和(自身を除く): 12713697

約数列:

[1, 3, 9, 13, 27, 39, 71, 117, 213, 351, 639, 823, 923, 1917, 2469, 2769, 7407, 8307, 10699, 22221, 24921, 32097, 58433, 96291, 175299, 288873, 525897, 759629, 1577691, 2278887, 6836661, 20509983]

約数ペア:

[(1, 20509983), (3, 6836661), (9, 2278887), (13, 1577691), (27, 759629), (39, 525897), (71, 288873), (117, 175299), (213, 96291), (351, 58433), (639, 32097), (823, 24921), (923, 22221), (1917, 10699), (2469, 8307), (2769, 7407)]