20898921

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{1663}}^1$

素因数の和:1796

約数の個数: 16

約数和(自身を含む): 28753920

約数和(自身を除く): 7854999

約数列:

[1, 3, 59, 71, 177, 213, 1663, 4189, 4989, 12567, 98117, 118073, 294351, 354219, 6966307, 20898921]

約数ペア:

[(1, 20898921), (3, 6966307), (59, 354219), (71, 294351), (177, 118073), (213, 98117), (1663, 12567), (4189, 4989)]