21279699

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{179}}^1$

素因数の和:249

約数の個数: 64

約数和(自身を含む): 39398400

約数和(自身を除く): 18118701

約数列:

[1, 3, 7, 9, 17, 21, 27, 37, 51, 63, 111, 119, 153, 179, 189, 259, 333, 357, 459, 537, 629, 777, 999, 1071, 1253, 1611, 1887, 2331, 3043, 3213, 3759, 4403, 4833, 5661, 6623, 6993, 9129, 11277, 13209, 16983, 19869, 21301, 27387, 33831, 39627, 46361, 59607, 63903, 82161, 112591, 118881, 139083, 178821, 191709, 337773, 417249, 575127, 788137, 1013319, 1251747, 2364411, 3039957, 7093233, 21279699]

約数ペア:

[(1, 21279699), (3, 7093233), (7, 3039957), (9, 2364411), (17, 1251747), (21, 1013319), (27, 788137), (37, 575127), (51, 417249), (63, 337773), (111, 191709), (119, 178821), (153, 139083), (179, 118881), (189, 112591), (259, 82161), (333, 63903), (357, 59607), (459, 46361), (537, 39627), (629, 33831), (777, 27387), (999, 21301), (1071, 19869), (1253, 16983), (1611, 13209), (1887, 11277), (2331, 9129), (3043, 6993), (3213, 6623), (3759, 5661), (4403, 4833)]