20447360

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{743}}^1$

素因数の和:805

約数の個数: 64

約数和(自身を含む): 50086080

約数和(自身を除く): 29638720

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, 743, 860, 1376, 1486, 1720, 2752, 2972, 3440, 3715, 5504, 5944, 6880, 7430, 11888, 13760, 14860, 23776, 27520, 29720, 31949, 47552, 59440, 63898, 95104, 118880, 127796, 159745, 237760, 255592, 319490, 475520, 511184, 638980, 1022368, 1277960, 2044736, 2555920, 4089472, 5111840, 10223680, 20447360]

約数ペア:

[(1, 20447360), (2, 10223680), (4, 5111840), (5, 4089472), (8, 2555920), (10, 2044736), (16, 1277960), (20, 1022368), (32, 638980), (40, 511184), (43, 475520), (64, 319490), (80, 255592), (86, 237760), (128, 159745), (160, 127796), (172, 118880), (215, 95104), (320, 63898), (344, 59440), (430, 47552), (640, 31949), (688, 29720), (743, 27520), (860, 23776), (1376, 14860), (1486, 13760), (1720, 11888), (2752, 7430), (2972, 6880), (3440, 5944), (3715, 5504)]