20565657

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1$

素因数の和:144

約数の個数: 80

約数和(自身を含む): 39029760

約数和(自身を除く): 18464103

約数列:

[1, 3, 7, 9, 19, 21, 23, 27, 57, 63, 69, 81, 83, 133, 161, 171, 189, 207, 249, 399, 437, 483, 513, 567, 581, 621, 747, 1197, 1311, 1449, 1539, 1577, 1743, 1863, 1909, 2241, 3059, 3591, 3933, 4347, 4731, 5229, 5727, 6723, 9177, 10773, 11039, 11799, 13041, 13363, 14193, 15687, 17181, 27531, 33117, 35397, 36271, 40089, 42579, 47061, 51543, 82593, 99351, 108813, 120267, 127737, 154629, 247779, 253897, 298053, 326439, 360801, 761691, 894159, 979317, 1082403, 2285073, 2937951, 6855219, 20565657]

約数ペア:

[(1, 20565657), (3, 6855219), (7, 2937951), (9, 2285073), (19, 1082403), (21, 979317), (23, 894159), (27, 761691), (57, 360801), (63, 326439), (69, 298053), (81, 253897), (83, 247779), (133, 154629), (161, 127737), (171, 120267), (189, 108813), (207, 99351), (249, 82593), (399, 51543), (437, 47061), (483, 42579), (513, 40089), (567, 36271), (581, 35397), (621, 33117), (747, 27531), (1197, 17181), (1311, 15687), (1449, 14193), (1539, 13363), (1577, 13041), (1743, 11799), (1863, 11039), (1909, 10773), (2241, 9177), (3059, 6723), (3591, 5727), (3933, 5229), (4347, 4731)]