21716380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{857}}^1$

素因数の和:1054

約数の個数: 48

約数和(自身を含む): 52468416

約数和(自身を除く): 30752036

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 181, 362, 724, 857, 905, 1267, 1714, 1810, 2534, 3428, 3620, 4285, 5068, 5999, 6335, 8570, 11998, 12670, 17140, 23996, 25340, 29995, 59990, 119980, 155117, 310234, 620468, 775585, 1085819, 1551170, 2171638, 3102340, 4343276, 5429095, 10858190, 21716380]

約数ペア:

[(1, 21716380), (2, 10858190), (4, 5429095), (5, 4343276), (7, 3102340), (10, 2171638), (14, 1551170), (20, 1085819), (28, 775585), (35, 620468), (70, 310234), (140, 155117), (181, 119980), (362, 59990), (724, 29995), (857, 25340), (905, 23996), (1267, 17140), (1714, 12670), (1810, 11998), (2534, 8570), (3428, 6335), (3620, 5999), (4285, 5068)]