19871977

素因数分解:

${\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:420

約数の個数: 16

約数和(自身を含む): 21593088

約数和(自身を除く): 1721111

約数列:

[1, 23, 43, 71, 283, 989, 1633, 3053, 6509, 12169, 20093, 70219, 279887, 462139, 863999, 19871977]

約数ペア:

[(1, 19871977), (23, 863999), (43, 462139), (71, 279887), (283, 70219), (989, 20093), (1633, 12169), (3053, 6509)]