80720729.000000000

素因数分解:

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

素因数の和:1061

約数の個数: 72

約数和(自身を含む): 373837464

約数和(自身を除く): 221822804

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 181, 196, 245, 362, 490, 724, 857, 905, 980, 1267, 1714, 1810, 2534, 3428, 3620, 4285, 5068, 5999, 6335, 8570, 8869, 11998, 12670, 17140, 17738, 23996, 25340, 29995, 35476, 41993, 44345, 59990, 83986, 88690, 119980, 155117, 167972, 177380, 209965, 310234, 419930, 620468, 775585, 839860, 1085819, 1551170, 2171638, 3102340, 4343276, 5429095, 7600733, 10858190, 15201466, 21716380, 30402932, 38003665, 76007330, 152014660]

約数ペア:

[(1, 152014660), (2, 76007330), (4, 38003665), (5, 30402932), (7, 21716380), (10, 15201466), (14, 10858190), (20, 7600733), (28, 5429095), (35, 4343276), (49, 3102340), (70, 2171638), (98, 1551170), (140, 1085819), (181, 839860), (196, 775585), (245, 620468), (362, 419930), (490, 310234), (724, 209965), (857, 177380), (905, 167972), (980, 155117), (1267, 119980), (1714, 88690), (1810, 83986), (2534, 59990), (3428, 44345), (3620, 41993), (4285, 35476), (5068, 29995), (5999, 25340), (6335, 23996), (8570, 17738), (8869, 17140), (11998, 12670)]