20854617

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^2\times {\mathrm{197}}^1$

素因数の和:349

約数の個数: 24

約数和(自身を含む): 32395968

約数和(自身を除く): 11541351

約数列:

[1, 3, 7, 21, 71, 197, 213, 497, 591, 1379, 1491, 4137, 5041, 13987, 15123, 35287, 41961, 97909, 105861, 293727, 993077, 2979231, 6951539, 20854617]

約数ペア:

[(1, 20854617), (3, 6951539), (7, 2979231), (21, 993077), (71, 293727), (197, 105861), (213, 97909), (497, 41961), (591, 35287), (1379, 15123), (1491, 13987), (4137, 5041)]