209399380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{643}}^1\times {\mathrm{857}}^1$

素因数の和:1528

約数の個数: 48

約数和(自身を含む): 464143680

約数和(自身を除く): 254744300

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 643, 857, 1286, 1714, 2572, 3215, 3428, 4285, 6430, 8570, 12217, 12860, 16283, 17140, 24434, 32566, 48868, 61085, 65132, 81415, 122170, 162830, 244340, 325660, 551051, 1102102, 2204204, 2755255, 5510510, 10469969, 11021020, 20939938, 41879876, 52349845, 104699690, 209399380]

約数ペア:

[(1, 209399380), (2, 104699690), (4, 52349845), (5, 41879876), (10, 20939938), (19, 11021020), (20, 10469969), (38, 5510510), (76, 2755255), (95, 2204204), (190, 1102102), (380, 551051), (643, 325660), (857, 244340), (1286, 162830), (1714, 122170), (2572, 81415), (3215, 65132), (3428, 61085), (4285, 48868), (6430, 32566), (8570, 24434), (12217, 17140), (12860, 16283)]