19915390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{151}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 40027680

約数和(自身を除く): 20112290

約数列:

[1, 2, 5, 10, 11, 22, 55, 109, 110, 121, 151, 218, 242, 302, 545, 605, 755, 1090, 1199, 1210, 1510, 1661, 2398, 3322, 5995, 8305, 11990, 13189, 16459, 16610, 18271, 26378, 32918, 36542, 65945, 82295, 91355, 131890, 164590, 181049, 182710, 362098, 905245, 1810490, 1991539, 3983078, 9957695, 19915390]

約数ペア:

[(1, 19915390), (2, 9957695), (5, 3983078), (10, 1991539), (11, 1810490), (22, 905245), (55, 362098), (109, 182710), (110, 181049), (121, 164590), (151, 131890), (218, 91355), (242, 82295), (302, 65945), (545, 36542), (605, 32918), (755, 26378), (1090, 18271), (1199, 16610), (1210, 16459), (1510, 13189), (1661, 11990), (2398, 8305), (3322, 5995)]