19903510

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{7867}}^1$

素因数の和:7908

約数の個数: 32

約数和(自身を含む): 40787712

約数和(自身を除く): 20884202

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 110, 115, 230, 253, 506, 1265, 2530, 7867, 15734, 39335, 78670, 86537, 173074, 180941, 361882, 432685, 865370, 904705, 1809410, 1990351, 3980702, 9951755, 19903510]

約数ペア:

[(1, 19903510), (2, 9951755), (5, 3980702), (10, 1990351), (11, 1809410), (22, 904705), (23, 865370), (46, 432685), (55, 361882), (110, 180941), (115, 173074), (230, 86537), (253, 78670), (506, 39335), (1265, 15734), (2530, 7867)]