20764720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^2\times {\mathrm{719}}^1$

素因数の和:770

約数の個数: 60

約数和(自身を含む): 51023520

約数和(自身を除く): 30258800

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 361, 380, 719, 722, 760, 1438, 1444, 1520, 1805, 2876, 2888, 3595, 3610, 5752, 5776, 7190, 7220, 11504, 13661, 14380, 14440, 27322, 28760, 28880, 54644, 57520, 68305, 109288, 136610, 218576, 259559, 273220, 519118, 546440, 1038236, 1092880, 1297795, 2076472, 2595590, 4152944, 5191180, 10382360, 20764720]

約数ペア:

[(1, 20764720), (2, 10382360), (4, 5191180), (5, 4152944), (8, 2595590), (10, 2076472), (16, 1297795), (19, 1092880), (20, 1038236), (38, 546440), (40, 519118), (76, 273220), (80, 259559), (95, 218576), (152, 136610), (190, 109288), (304, 68305), (361, 57520), (380, 54644), (719, 28880), (722, 28760), (760, 27322), (1438, 14440), (1444, 14380), (1520, 13661), (1805, 11504), (2876, 7220), (2888, 7190), (3595, 5776), (3610, 5752)]