20939655

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 37537920

約数和(自身を除く): 16598265

約数列:

[1, 3, 5, 11, 15, 33, 55, 83, 121, 139, 165, 249, 363, 415, 417, 605, 695, 913, 1245, 1529, 1815, 2085, 2739, 4565, 4587, 7645, 10043, 11537, 13695, 16819, 22935, 30129, 34611, 50215, 50457, 57685, 84095, 126907, 150645, 173055, 252285, 380721, 634535, 1395977, 1903605, 4187931, 6979885, 20939655]

約数ペア:

[(1, 20939655), (3, 6979885), (5, 4187931), (11, 1903605), (15, 1395977), (33, 634535), (55, 380721), (83, 252285), (121, 173055), (139, 150645), (165, 126907), (249, 84095), (363, 57685), (415, 50457), (417, 50215), (605, 34611), (695, 30129), (913, 22935), (1245, 16819), (1529, 13695), (1815, 11537), (2085, 10043), (2739, 7645), (4565, 4587)]