21285605

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20369}}^1$

素因数の和:20404

約数の個数: 16

約数和(自身を含む): 29332800

約数和(自身を除く): 8047195

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20369, 101845, 224059, 387011, 1120295, 1935055, 4257121, 21285605]

約数ペア:

[(1, 21285605), (5, 4257121), (11, 1935055), (19, 1120295), (55, 387011), (95, 224059), (209, 101845), (1045, 20369)]