19511680

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{709}}^1$

素因数の和:771

約数の個数: 64

約数和(自身を含む): 47797200

約数和(自身を除く): 28285520

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, 709, 860, 1376, 1418, 1720, 2752, 2836, 3440, 3545, 5504, 5672, 6880, 7090, 11344, 13760, 14180, 22688, 27520, 28360, 30487, 45376, 56720, 60974, 90752, 113440, 121948, 152435, 226880, 243896, 304870, 453760, 487792, 609740, 975584, 1219480, 1951168, 2438960, 3902336, 4877920, 9755840, 19511680]

約数ペア:

[(1, 19511680), (2, 9755840), (4, 4877920), (5, 3902336), (8, 2438960), (10, 1951168), (16, 1219480), (20, 975584), (32, 609740), (40, 487792), (43, 453760), (64, 304870), (80, 243896), (86, 226880), (128, 152435), (160, 121948), (172, 113440), (215, 90752), (320, 60974), (344, 56720), (430, 45376), (640, 30487), (688, 28360), (709, 27520), (860, 22688), (1376, 14180), (1418, 13760), (1720, 11344), (2752, 7090), (2836, 6880), (3440, 5672), (3545, 5504)]