20878221

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2467}}^1$

素因数の和:2521

約数の個数: 32

約数和(自身を含む): 35381248

約数和(自身を除く): 14503027

約数列:

[1, 3, 7, 13, 21, 31, 39, 91, 93, 217, 273, 403, 651, 1209, 2467, 2821, 7401, 8463, 17269, 32071, 51807, 76477, 96213, 224497, 229431, 535339, 673491, 994201, 1606017, 2982603, 6959407, 20878221]

約数ペア:

[(1, 20878221), (3, 6959407), (7, 2982603), (13, 1606017), (21, 994201), (31, 673491), (39, 535339), (91, 229431), (93, 224497), (217, 96213), (273, 76477), (403, 51807), (651, 32071), (1209, 17269), (2467, 8463), (2821, 7401)]