21485807

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2543}}^1$

素因数の和:2638

約数の個数: 16

約数和(自身を含む): 26376192

約数和(自身を除く): 4890385

約数列:

[1, 7, 17, 71, 119, 497, 1207, 2543, 8449, 17801, 43231, 180553, 302617, 1263871, 3069401, 21485807]

約数ペア:

[(1, 21485807), (7, 3069401), (17, 1263871), (71, 302617), (119, 180553), (497, 43231), (1207, 17801), (2543, 8449)]