21611681

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 28213248

約数和(自身を除く): 6601567

約数列:

[1, 7, 13, 31, 47, 91, 163, 217, 329, 403, 611, 1141, 1457, 2119, 2821, 4277, 5053, 7661, 10199, 14833, 18941, 35371, 53627, 65689, 99593, 132587, 237491, 459823, 697151, 1662437, 3087383, 21611681]

約数ペア:

[(1, 21611681), (7, 3087383), (13, 1662437), (31, 697151), (47, 459823), (91, 237491), (163, 132587), (217, 99593), (329, 65689), (403, 53627), (611, 35371), (1141, 18941), (1457, 14833), (2119, 10199), (2821, 7661), (4277, 5053)]