20656790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{193}}^1$

素因数の和:357

約数の個数: 64

約数和(自身を含む): 46932480

約数和(自身を除く): 26275690

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 139, 154, 193, 278, 385, 386, 695, 770, 965, 973, 1351, 1390, 1529, 1930, 1946, 2123, 2702, 3058, 4246, 4865, 6755, 7645, 9730, 10615, 10703, 13510, 14861, 15290, 21230, 21406, 26827, 29722, 53515, 53654, 74305, 107030, 134135, 148610, 187789, 268270, 295097, 375578, 590194, 938945, 1475485, 1877890, 2065679, 2950970, 4131358, 10328395, 20656790]

約数ペア:

[(1, 20656790), (2, 10328395), (5, 4131358), (7, 2950970), (10, 2065679), (11, 1877890), (14, 1475485), (22, 938945), (35, 590194), (55, 375578), (70, 295097), (77, 268270), (110, 187789), (139, 148610), (154, 134135), (193, 107030), (278, 74305), (385, 53654), (386, 53515), (695, 29722), (770, 26827), (965, 21406), (973, 21230), (1351, 15290), (1390, 14861), (1529, 13510), (1930, 10703), (1946, 10615), (2123, 9730), (2702, 7645), (3058, 6755), (4246, 4865)]