21239508

素因数分解:

$2^2\times 3^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:432

約数の個数: 48

約数和(自身を含む): 50972544

約数和(自身を除く): 29733036

約数列:

[1, 2, 3, 4, 6, 12, 71, 97, 142, 194, 213, 257, 284, 291, 388, 426, 514, 582, 771, 852, 1028, 1164, 1542, 3084, 6887, 13774, 18247, 20661, 24929, 27548, 36494, 41322, 49858, 54741, 72988, 74787, 82644, 99716, 109482, 149574, 218964, 299148, 1769959, 3539918, 5309877, 7079836, 10619754, 21239508]

約数ペア:

[(1, 21239508), (2, 10619754), (3, 7079836), (4, 5309877), (6, 3539918), (12, 1769959), (71, 299148), (97, 218964), (142, 149574), (194, 109482), (213, 99716), (257, 82644), (284, 74787), (291, 72988), (388, 54741), (426, 49858), (514, 41322), (582, 36494), (771, 27548), (852, 24929), (1028, 20661), (1164, 18247), (1542, 13774), (3084, 6887)]