81226040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2087}}^1$

素因数の和:2244

約数の個数: 64

約数和(自身を含む): 210470400

約数和(自身を除く): 129244360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 556, 695, 973, 1112, 1390, 1946, 2087, 2780, 3892, 4174, 4865, 5560, 7784, 8348, 9730, 10435, 14609, 16696, 19460, 20870, 29218, 38920, 41740, 58436, 73045, 83480, 116872, 146090, 290093, 292180, 580186, 584360, 1160372, 1450465, 2030651, 2320744, 2900930, 4061302, 5801860, 8122604, 10153255, 11603720, 16245208, 20306510, 40613020, 81226040]

約数ペア:

[(1, 81226040), (2, 40613020), (4, 20306510), (5, 16245208), (7, 11603720), (8, 10153255), (10, 8122604), (14, 5801860), (20, 4061302), (28, 2900930), (35, 2320744), (40, 2030651), (56, 1450465), (70, 1160372), (139, 584360), (140, 580186), (278, 292180), (280, 290093), (556, 146090), (695, 116872), (973, 83480), (1112, 73045), (1390, 58436), (1946, 41740), (2087, 38920), (2780, 29218), (3892, 20870), (4174, 19460), (4865, 16696), (5560, 14609), (7784, 10435), (8348, 9730)]