19778120

素因数分解:

$2^3\times 5^1\times {\mathrm{383}}^1\times {\mathrm{1291}}^1$

素因数の和:1685

約数の個数: 32

約数和(自身を含む): 44651520

約数和(自身を除く): 24873400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 383, 766, 1291, 1532, 1915, 2582, 3064, 3830, 5164, 6455, 7660, 10328, 12910, 15320, 25820, 51640, 494453, 988906, 1977812, 2472265, 3955624, 4944530, 9889060, 19778120]

約数ペア:

[(1, 19778120), (2, 9889060), (4, 4944530), (5, 3955624), (8, 2472265), (10, 1977812), (20, 988906), (40, 494453), (383, 51640), (766, 25820), (1291, 15320), (1532, 12910), (1915, 10328), (2582, 7660), (3064, 6455), (3830, 5164)]