20885480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6781}}^1$

素因数の和:6810

約数の個数: 64

約数和(自身を含む): 58596480

約数和(自身を除く): 37711000

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 220, 280, 308, 385, 440, 616, 770, 1540, 3080, 6781, 13562, 27124, 33905, 47467, 54248, 67810, 74591, 94934, 135620, 149182, 189868, 237335, 271240, 298364, 372955, 379736, 474670, 522137, 596728, 745910, 949340, 1044274, 1491820, 1898680, 2088548, 2610685, 2983640, 4177096, 5221370, 10442740, 20885480]

約数ペア:

[(1, 20885480), (2, 10442740), (4, 5221370), (5, 4177096), (7, 2983640), (8, 2610685), (10, 2088548), (11, 1898680), (14, 1491820), (20, 1044274), (22, 949340), (28, 745910), (35, 596728), (40, 522137), (44, 474670), (55, 379736), (56, 372955), (70, 298364), (77, 271240), (88, 237335), (110, 189868), (140, 149182), (154, 135620), (220, 94934), (280, 74591), (308, 67810), (385, 54248), (440, 47467), (616, 33905), (770, 27124), (1540, 13562), (3080, 6781)]