20168918

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:213

約数の個数: 64

約数和(自身を含む): 40711680

約数和(自身を除く): 20542762

約数列:

[1, 2, 7, 11, 14, 19, 22, 38, 61, 77, 113, 122, 133, 154, 209, 226, 266, 418, 427, 671, 791, 854, 1159, 1243, 1342, 1463, 1582, 2147, 2318, 2486, 2926, 4294, 4697, 6893, 8113, 8701, 9394, 12749, 13786, 15029, 16226, 17402, 23617, 25498, 30058, 47234, 48251, 75823, 89243, 96502, 130967, 151646, 165319, 178486, 261934, 330638, 530761, 916769, 1061522, 1440637, 1833538, 2881274, 10084459, 20168918]

約数ペア:

[(1, 20168918), (2, 10084459), (7, 2881274), (11, 1833538), (14, 1440637), (19, 1061522), (22, 916769), (38, 530761), (61, 330638), (77, 261934), (113, 178486), (122, 165319), (133, 151646), (154, 130967), (209, 96502), (226, 89243), (266, 75823), (418, 48251), (427, 47234), (671, 30058), (791, 25498), (854, 23617), (1159, 17402), (1243, 16226), (1342, 15029), (1463, 13786), (1582, 12749), (2147, 9394), (2318, 8701), (2486, 8113), (2926, 6893), (4294, 4697)]