21008379

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{709}}^1$

素因数の和:819

約数の個数: 32

約数和(自身を含む): 34352640

約数和(自身を除く): 13344261

約数列:

[1, 3, 7, 17, 21, 51, 83, 119, 249, 357, 581, 709, 1411, 1743, 2127, 4233, 4963, 9877, 12053, 14889, 29631, 36159, 58847, 84371, 176541, 253113, 411929, 1000399, 1235787, 3001197, 7002793, 21008379]

約数ペア:

[(1, 21008379), (3, 7002793), (7, 3001197), (17, 1235787), (21, 1000399), (51, 411929), (83, 253113), (119, 176541), (249, 84371), (357, 58847), (581, 36159), (709, 29631), (1411, 14889), (1743, 12053), (2127, 9877), (4233, 4963)]