19963480

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1283}}^1$

素因数の和:1683

約数の個数: 32

約数和(自身を含む): 45068400

約数和(自身を除く): 25104920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1283, 1556, 1945, 2566, 3112, 3890, 5132, 6415, 7780, 10264, 12830, 15560, 25660, 51320, 499087, 998174, 1996348, 2495435, 3992696, 4990870, 9981740, 19963480]

約数ペア:

[(1, 19963480), (2, 9981740), (4, 4990870), (5, 3992696), (8, 2495435), (10, 1996348), (20, 998174), (40, 499087), (389, 51320), (778, 25660), (1283, 15560), (1556, 12830), (1945, 10264), (2566, 7780), (3112, 6415), (3890, 5132)]