20308911

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:391

約数の個数: 32

約数和(自身を含む): 32099328

約数和(自身を除く): 11790417

約数列:

[1, 3, 7, 21, 53, 71, 159, 213, 257, 371, 497, 771, 1113, 1491, 1799, 3763, 5397, 11289, 13621, 18247, 26341, 40863, 54741, 79023, 95347, 127729, 286041, 383187, 967091, 2901273, 6769637, 20308911]

約数ペア:

[(1, 20308911), (3, 6769637), (7, 2901273), (21, 967091), (53, 383187), (71, 286041), (159, 127729), (213, 95347), (257, 79023), (371, 54741), (497, 40863), (771, 26341), (1113, 18247), (1491, 13621), (1799, 11289), (3763, 5397)]