20389120

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{937}}^1$

素因数の和:975

約数の個数: 72

約数和(自身を含む): 51766344

約数和(自身を除く): 31377224

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 544, 640, 680, 937, 1088, 1280, 1360, 1874, 2176, 2720, 3748, 4352, 4685, 5440, 7496, 9370, 10880, 14992, 15929, 18740, 21760, 29984, 31858, 37480, 59968, 63716, 74960, 79645, 119936, 127432, 149920, 159290, 239872, 254864, 299840, 318580, 509728, 599680, 637160, 1019456, 1199360, 1274320, 2038912, 2548640, 4077824, 5097280, 10194560, 20389120]

約数ペア:

[(1, 20389120), (2, 10194560), (4, 5097280), (5, 4077824), (8, 2548640), (10, 2038912), (16, 1274320), (17, 1199360), (20, 1019456), (32, 637160), (34, 599680), (40, 509728), (64, 318580), (68, 299840), (80, 254864), (85, 239872), (128, 159290), (136, 149920), (160, 127432), (170, 119936), (256, 79645), (272, 74960), (320, 63716), (340, 59968), (544, 37480), (640, 31858), (680, 29984), (937, 21760), (1088, 18740), (1280, 15929), (1360, 14992), (1874, 10880), (2176, 9370), (2720, 7496), (3748, 5440), (4352, 4685)]