20972000

素因数分解:

$2^5\times 5^3\times 7^2\times {\mathrm{107}}^1$

素因数の和:146

約数の個数: 144

約数和(自身を含む): 60501168

約数和(自身を除く): 39529168

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 70, 80, 98, 100, 107, 112, 125, 140, 160, 175, 196, 200, 214, 224, 245, 250, 280, 350, 392, 400, 428, 490, 500, 535, 560, 700, 749, 784, 800, 856, 875, 980, 1000, 1070, 1120, 1225, 1400, 1498, 1568, 1712, 1750, 1960, 2000, 2140, 2450, 2675, 2800, 2996, 3424, 3500, 3745, 3920, 4000, 4280, 4900, 5243, 5350, 5600, 5992, 6125, 7000, 7490, 7840, 8560, 9800, 10486, 10700, 11984, 12250, 13375, 14000, 14980, 17120, 18725, 19600, 20972, 21400, 23968, 24500, 26215, 26750, 28000, 29960, 37450, 39200, 41944, 42800, 49000, 52430, 53500, 59920, 74900, 83888, 85600, 93625, 98000, 104860, 107000, 119840, 131075, 149800, 167776, 187250, 196000, 209720, 214000, 262150, 299600, 374500, 419440, 428000, 524300, 599200, 655375, 749000, 838880, 1048600, 1310750, 1498000, 2097200, 2621500, 2996000, 4194400, 5243000, 10486000, 20972000]

約数ペア:

[(1, 20972000), (2, 10486000), (4, 5243000), (5, 4194400), (7, 2996000), (8, 2621500), (10, 2097200), (14, 1498000), (16, 1310750), (20, 1048600), (25, 838880), (28, 749000), (32, 655375), (35, 599200), (40, 524300), (49, 428000), (50, 419440), (56, 374500), (70, 299600), (80, 262150), (98, 214000), (100, 209720), (107, 196000), (112, 187250), (125, 167776), (140, 149800), (160, 131075), (175, 119840), (196, 107000), (200, 104860), (214, 98000), (224, 93625), (245, 85600), (250, 83888), (280, 74900), (350, 59920), (392, 53500), (400, 52430), (428, 49000), (490, 42800), (500, 41944), (535, 39200), (560, 37450), (700, 29960), (749, 28000), (784, 26750), (800, 26215), (856, 24500), (875, 23968), (980, 21400), (1000, 20972), (1070, 19600), (1120, 18725), (1225, 17120), (1400, 14980), (1498, 14000), (1568, 13375), (1712, 12250), (1750, 11984), (1960, 10700), (2000, 10486), (2140, 9800), (2450, 8560), (2675, 7840), (2800, 7490), (2996, 7000), (3424, 6125), (3500, 5992), (3745, 5600), (3920, 5350), (4000, 5243), (4280, 4900)]