81795245

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:234

約数の個数: 64

約数和(自身を含む): 127733760

約数和(自身を除く): 45938515

約数列:

[1, 5, 7, 17, 23, 35, 43, 85, 115, 119, 139, 161, 215, 301, 391, 595, 695, 731, 805, 973, 989, 1505, 1955, 2363, 2737, 3197, 3655, 4865, 4945, 5117, 5977, 6923, 11815, 13685, 15985, 16541, 16813, 22379, 25585, 29885, 34615, 41839, 54349, 82705, 84065, 101609, 111895, 117691, 137471, 209195, 271745, 380443, 508045, 588455, 687355, 711263, 962297, 1902215, 2337007, 3556315, 4811485, 11685035, 16359049, 81795245]

約数ペア:

[(1, 81795245), (5, 16359049), (7, 11685035), (17, 4811485), (23, 3556315), (35, 2337007), (43, 1902215), (85, 962297), (115, 711263), (119, 687355), (139, 588455), (161, 508045), (215, 380443), (301, 271745), (391, 209195), (595, 137471), (695, 117691), (731, 111895), (805, 101609), (973, 84065), (989, 82705), (1505, 54349), (1955, 41839), (2363, 34615), (2737, 29885), (3197, 25585), (3655, 22379), (4865, 16813), (4945, 16541), (5117, 15985), (5977, 13685), (6923, 11815)]