21079891

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{311}}^1\times {\mathrm{421}}^1$

素因数の和:762

約数の個数: 16

約数和(自身を含む): 25279488

約数和(自身を除く): 4199597

約数列:

[1, 7, 23, 161, 311, 421, 2177, 2947, 7153, 9683, 50071, 67781, 130931, 916517, 3011413, 21079891]

約数ペア:

[(1, 21079891), (7, 3011413), (23, 916517), (161, 130931), (311, 67781), (421, 50071), (2177, 9683), (2947, 7153)]