19979755

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{2447}}^1$

素因数の和:2546

約数の個数: 16

約数和(自身を含む): 25380864

約数和(自身を除く): 5401109

約数列:

[1, 5, 23, 71, 115, 355, 1633, 2447, 8165, 12235, 56281, 173737, 281405, 868685, 3995951, 19979755]

約数ペア:

[(1, 19979755), (5, 3995951), (23, 868685), (71, 281405), (115, 173737), (355, 56281), (1633, 12235), (2447, 8165)]