20509281

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{19477}}^1$

素因数の和:19502

約数の個数: 20

約数和(自身を含む): 32995732

約数和(自身を除く): 12486451

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 19477, 58431, 175293, 253201, 525879, 759603, 1577637, 2278809, 6836427, 20509281]

約数ペア:

[(1, 20509281), (3, 6836427), (9, 2278809), (13, 1577637), (27, 759603), (39, 525879), (81, 253201), (117, 175293), (351, 58431), (1053, 19477)]