19911880

素因数分解:

$2^3\times 5^1\times {\mathrm{283}}^1\times {\mathrm{1759}}^1$

素因数の和:2053

約数の個数: 32

約数和(自身を含む): 44985600

約数和(自身を除く): 25073720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 283, 566, 1132, 1415, 1759, 2264, 2830, 3518, 5660, 7036, 8795, 11320, 14072, 17590, 35180, 70360, 497797, 995594, 1991188, 2488985, 3982376, 4977970, 9955940, 19911880]

約数ペア:

[(1, 19911880), (2, 9955940), (4, 4977970), (5, 3982376), (8, 2488985), (10, 1991188), (20, 995594), (40, 497797), (283, 70360), (566, 35180), (1132, 17590), (1415, 14072), (1759, 11320), (2264, 8795), (2830, 7036), (3518, 5660)]