20804498

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{389}}^1$

素因数の和:443

約数の個数: 48

約数和(自身を含む): 39213720

約数和(自身を除く): 18409222

約数列:

[1, 2, 11, 13, 17, 22, 26, 34, 121, 143, 187, 221, 242, 286, 374, 389, 442, 778, 1573, 2057, 2431, 3146, 4114, 4279, 4862, 5057, 6613, 8558, 10114, 13226, 26741, 47069, 53482, 55627, 72743, 85969, 94138, 111254, 145486, 171938, 611897, 800173, 945659, 1223794, 1600346, 1891318, 10402249, 20804498]

約数ペア:

[(1, 20804498), (2, 10402249), (11, 1891318), (13, 1600346), (17, 1223794), (22, 945659), (26, 800173), (34, 611897), (121, 171938), (143, 145486), (187, 111254), (221, 94138), (242, 85969), (286, 72743), (374, 55627), (389, 53482), (442, 47069), (778, 26741), (1573, 13226), (2057, 10114), (2431, 8558), (3146, 6613), (4114, 5057), (4279, 4862)]