21000251984

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{27925867}}^1$

素因数の和:27925922

約数の個数: 20

約数和(自身を含む): 41553691584

約数和(自身を除く): 20553439600

約数列:

[1, 2, 4, 8, 16, 47, 94, 188, 376, 752, 27925867, 55851734, 111703468, 223406936, 446813872, 1312515749, 2625031498, 5250062996, 10500125992, 21000251984]

約数ペア:

[(1, 21000251984), (2, 10500125992), (4, 5250062996), (8, 2625031498), (16, 1312515749), (47, 446813872), (94, 223406936), (188, 111703468), (376, 55851734), (752, 27925867)]