20971510

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{337}}^1$

素因数の和:485

約数の個数: 48

約数和(自身を含む): 44388864

約数和(自身を除く): 23417354

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 127, 245, 254, 337, 490, 635, 674, 889, 1270, 1685, 1778, 2359, 3370, 4445, 4718, 6223, 8890, 11795, 12446, 16513, 23590, 31115, 33026, 42799, 62230, 82565, 85598, 165130, 213995, 299593, 427990, 599186, 1497965, 2097151, 2995930, 4194302, 10485755, 20971510]

約数ペア:

[(1, 20971510), (2, 10485755), (5, 4194302), (7, 2995930), (10, 2097151), (14, 1497965), (35, 599186), (49, 427990), (70, 299593), (98, 213995), (127, 165130), (245, 85598), (254, 82565), (337, 62230), (490, 42799), (635, 33026), (674, 31115), (889, 23590), (1270, 16513), (1685, 12446), (1778, 11795), (2359, 8890), (3370, 6223), (4445, 4718)]