21511693

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{2521}}^1$

素因数の和:2604

約数の個数: 16

約数和(自身を含む): 26148096

約数和(自身を除く): 4636403

約数列:

[1, 7, 23, 53, 161, 371, 1219, 2521, 8533, 17647, 57983, 133613, 405881, 935291, 3073099, 21511693]

約数ペア:

[(1, 21511693), (7, 3073099), (23, 935291), (53, 405881), (161, 133613), (371, 57983), (1219, 17647), (2521, 8533)]