21229955

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{499}}^1$

素因数の和:698

約数の個数: 16

約数和(自身を含む): 26112000

約数和(自身を除く): 4882045

約数列:

[1, 5, 67, 127, 335, 499, 635, 2495, 8509, 33433, 42545, 63373, 167165, 316865, 4245991, 21229955]

約数ペア:

[(1, 21229955), (5, 4245991), (67, 316865), (127, 167165), (335, 63373), (499, 42545), (635, 33433), (2495, 8509)]