21587247

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{461}}^1$

素因数の和:532

約数の個数: 36

約数和(自身を含む): 35147112

約数和(自身を除く): 13559865

約数列:

[1, 3, 9, 11, 33, 43, 99, 121, 129, 363, 387, 461, 473, 1089, 1383, 1419, 4149, 4257, 5071, 5203, 15213, 15609, 19823, 45639, 46827, 55781, 59469, 167343, 178407, 218053, 502029, 654159, 1962477, 2398583, 7195749, 21587247]

約数ペア:

[(1, 21587247), (3, 7195749), (9, 2398583), (11, 1962477), (33, 654159), (43, 502029), (99, 218053), (121, 178407), (129, 167343), (363, 59469), (387, 55781), (461, 46827), (473, 45639), (1089, 19823), (1383, 15609), (1419, 15213), (4149, 5203), (4257, 5071)]