19809880

素因数分解:

$2^3\times 5^1\times {\mathrm{449}}^1\times {\mathrm{1103}}^1$

素因数の和:1563

約数の個数: 32

約数和(自身を含む): 44712000

約数和(自身を除く): 24902120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 449, 898, 1103, 1796, 2206, 2245, 3592, 4412, 4490, 5515, 8824, 8980, 11030, 17960, 22060, 44120, 495247, 990494, 1980988, 2476235, 3961976, 4952470, 9904940, 19809880]

約数ペア:

[(1, 19809880), (2, 9904940), (4, 4952470), (5, 3961976), (8, 2476235), (10, 1980988), (20, 990494), (40, 495247), (449, 44120), (898, 22060), (1103, 17960), (1796, 11030), (2206, 8980), (2245, 8824), (3592, 5515), (4412, 4490)]