21003381

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2179}}^1$

素因数の和:2215

約数の個数: 40

約数和(自身を含む): 37984320

約数和(自身を除く): 16980939

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 357, 459, 567, 1071, 1377, 2179, 3213, 6537, 9639, 15253, 19611, 37043, 45759, 58833, 111129, 137277, 176499, 259301, 333387, 411831, 777903, 1000161, 1235493, 2333709, 3000483, 7001127, 21003381]

約数ペア:

[(1, 21003381), (3, 7001127), (7, 3000483), (9, 2333709), (17, 1235493), (21, 1000161), (27, 777903), (51, 411831), (63, 333387), (81, 259301), (119, 176499), (153, 137277), (189, 111129), (357, 58833), (459, 45759), (567, 37043), (1071, 19611), (1377, 15253), (2179, 9639), (3213, 6537)]