19500920

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{977}}^1$

素因数の和:1487

約数の個数: 32

約数和(自身を含む): 44010000

約数和(自身を除く): 24509080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 977, 998, 1954, 1996, 2495, 3908, 3992, 4885, 4990, 7816, 9770, 9980, 19540, 19960, 39080, 487523, 975046, 1950092, 2437615, 3900184, 4875230, 9750460, 19500920]

約数ペア:

[(1, 19500920), (2, 9750460), (4, 4875230), (5, 3900184), (8, 2437615), (10, 1950092), (20, 975046), (40, 487523), (499, 39080), (977, 19960), (998, 19540), (1954, 9980), (1996, 9770), (2495, 7816), (3908, 4990), (3992, 4885)]