1221990301

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{857}}^1$

素因数の和:1105

約数の個数: 32

約数和(自身を含む): 1502392320

約数和(自身を除く): 280402019

約数列:

[1, 7, 19, 71, 133, 151, 497, 857, 1057, 1349, 2869, 5999, 9443, 10721, 16283, 20083, 60847, 75047, 113981, 129407, 203699, 425929, 905849, 1156093, 1425893, 2458733, 8092651, 9187897, 17211131, 64315279, 174570043, 1221990301]

約数ペア:

[(1, 1221990301), (7, 174570043), (19, 64315279), (71, 17211131), (133, 9187897), (151, 8092651), (497, 2458733), (857, 1425893), (1057, 1156093), (1349, 905849), (2869, 425929), (5999, 203699), (9443, 129407), (10721, 113981), (16283, 75047), (20083, 60847)]