19772840

素因数分解:

$2^3\times 5^1\times {\mathrm{653}}^1\times {\mathrm{757}}^1$

素因数の和:1421

約数の個数: 32

約数和(自身を含む): 44615880

約数和(自身を除く): 24843040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 653, 757, 1306, 1514, 2612, 3028, 3265, 3785, 5224, 6056, 6530, 7570, 13060, 15140, 26120, 30280, 494321, 988642, 1977284, 2471605, 3954568, 4943210, 9886420, 19772840]

約数ペア:

[(1, 19772840), (2, 9886420), (4, 4943210), (5, 3954568), (8, 2471605), (10, 1977284), (20, 988642), (40, 494321), (653, 30280), (757, 26120), (1306, 15140), (1514, 13060), (2612, 7570), (3028, 6530), (3265, 6056), (3785, 5224)]