20199680

素因数分解:

$2^8\times 5^1\times {\mathrm{43}}^1\times {\mathrm{367}}^1$

素因数の和:431

約数の個数: 72

約数和(自身を含む): 49644672

約数和(自身を除く): 29444992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 256, 320, 344, 367, 430, 640, 688, 734, 860, 1280, 1376, 1468, 1720, 1835, 2752, 2936, 3440, 3670, 5504, 5872, 6880, 7340, 11008, 11744, 13760, 14680, 15781, 23488, 27520, 29360, 31562, 46976, 55040, 58720, 63124, 78905, 93952, 117440, 126248, 157810, 234880, 252496, 315620, 469760, 504992, 631240, 1009984, 1262480, 2019968, 2524960, 4039936, 5049920, 10099840, 20199680]

約数ペア:

[(1, 20199680), (2, 10099840), (4, 5049920), (5, 4039936), (8, 2524960), (10, 2019968), (16, 1262480), (20, 1009984), (32, 631240), (40, 504992), (43, 469760), (64, 315620), (80, 252496), (86, 234880), (128, 157810), (160, 126248), (172, 117440), (215, 93952), (256, 78905), (320, 63124), (344, 58720), (367, 55040), (430, 46976), (640, 31562), (688, 29360), (734, 27520), (860, 23488), (1280, 15781), (1376, 14680), (1468, 13760), (1720, 11744), (1835, 11008), (2752, 7340), (2936, 6880), (3440, 5872), (3670, 5504)]