20832640

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{757}}^1$

素因数の和:819

約数の個数: 64

約数和(自身を含む): 51028560

約数和(自身を除く): 30195920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 320, 344, 430, 640, 688, 757, 860, 1376, 1514, 1720, 2752, 3028, 3440, 3785, 5504, 6056, 6880, 7570, 12112, 13760, 15140, 24224, 27520, 30280, 32551, 48448, 60560, 65102, 96896, 121120, 130204, 162755, 242240, 260408, 325510, 484480, 520816, 651020, 1041632, 1302040, 2083264, 2604080, 4166528, 5208160, 10416320, 20832640]

約数ペア:

[(1, 20832640), (2, 10416320), (4, 5208160), (5, 4166528), (8, 2604080), (10, 2083264), (16, 1302040), (20, 1041632), (32, 651020), (40, 520816), (43, 484480), (64, 325510), (80, 260408), (86, 242240), (128, 162755), (160, 130204), (172, 121120), (215, 96896), (320, 65102), (344, 60560), (430, 48448), (640, 32551), (688, 30280), (757, 27520), (860, 24224), (1376, 15140), (1514, 13760), (1720, 12112), (2752, 7570), (3028, 6880), (3440, 6056), (3785, 5504)]