19719880

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1123}}^1$

素因数の和:1573

約数の個数: 32

約数和(自身を含む): 44510400

約数和(自身を除く): 24790520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1123, 1756, 2195, 2246, 3512, 4390, 4492, 5615, 8780, 8984, 11230, 17560, 22460, 44920, 492997, 985994, 1971988, 2464985, 3943976, 4929970, 9859940, 19719880]

約数ペア:

[(1, 19719880), (2, 9859940), (4, 4929970), (5, 3943976), (8, 2464985), (10, 1971988), (20, 985994), (40, 492997), (439, 44920), (878, 22460), (1123, 17560), (1756, 11230), (2195, 8984), (2246, 8780), (3512, 5615), (4390, 4492)]