21997855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{6779}}^1$

素因数の和:6854

約数の個数: 16

約数和(自身を含む): 29289600

約数和(自身を除く): 7291745

約数列:

[1, 5, 11, 55, 59, 295, 649, 3245, 6779, 33895, 74569, 372845, 399961, 1999805, 4399571, 21997855]

約数ペア:

[(1, 21997855), (5, 4399571), (11, 1999805), (55, 399961), (59, 372845), (295, 74569), (649, 33895), (3245, 6779)]