21175385

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{55001}}^1$

素因数の和:55024

約数の個数: 16

約数和(自身を含む): 31681152

約数和(自身を除く): 10505767

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 55001, 275005, 385007, 605011, 1925035, 3025055, 4235077, 21175385]

約数ペア:

[(1, 21175385), (5, 4235077), (7, 3025055), (11, 1925035), (35, 605011), (55, 385007), (77, 275005), (385, 55001)]