21999397

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{659}}^1$

素因数の和:936

約数の個数: 16

約数和(自身を含む): 26611200

約数和(自身を除く): 4611803

約数列:

[1, 7, 19, 133, 251, 659, 1757, 4613, 4769, 12521, 33383, 87647, 165409, 1157863, 3142771, 21999397]

約数ペア:

[(1, 21999397), (7, 3142771), (19, 1157863), (133, 165409), (251, 87647), (659, 33383), (1757, 12521), (4613, 4769)]