21508715921

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{661}}^1\times {\mathrm{3877}}^1$

素因数の和:4665

約数の個数: 32

約数和(自身を含む): 27110012160

約数和(自身を除く): 5601296239

約数列:

[1, 7, 11, 77, 109, 661, 763, 1199, 3877, 4627, 7271, 8393, 27139, 42647, 50897, 72049, 298529, 422593, 504343, 792539, 2562697, 2958151, 4648523, 5547773, 17938879, 28189667, 32539661, 197327669, 279333973, 1955337811, 3072673703, 21508715921]

約数ペア:

[(1, 21508715921), (7, 3072673703), (11, 1955337811), (77, 279333973), (109, 197327669), (661, 32539661), (763, 28189667), (1199, 17938879), (3877, 5547773), (4627, 4648523), (7271, 2958151), (8393, 2562697), (27139, 792539), (42647, 504343), (50897, 422593), (72049, 298529)]