19720220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1039}}^1$

素因数の和:1134

約数の個数: 48

約数和(自身を含む): 45252480

約数和(自身を除く): 25532260

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 73, 130, 146, 260, 292, 365, 730, 949, 1039, 1460, 1898, 2078, 3796, 4156, 4745, 5195, 9490, 10390, 13507, 18980, 20780, 27014, 54028, 67535, 75847, 135070, 151694, 270140, 303388, 379235, 758470, 986011, 1516940, 1972022, 3944044, 4930055, 9860110, 19720220]

約数ペア:

[(1, 19720220), (2, 9860110), (4, 4930055), (5, 3944044), (10, 1972022), (13, 1516940), (20, 986011), (26, 758470), (52, 379235), (65, 303388), (73, 270140), (130, 151694), (146, 135070), (260, 75847), (292, 67535), (365, 54028), (730, 27014), (949, 20780), (1039, 18980), (1460, 13507), (1898, 10390), (2078, 9490), (3796, 5195), (4156, 4745)]