20517280

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2617}}^1$

素因数の和:2646

約数の個数: 72

約数和(自身を含む): 56407428

約数和(自身を除く): 35890148

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2617, 3920, 5234, 7840, 10468, 13085, 18319, 20936, 26170, 36638, 41872, 52340, 73276, 83744, 91595, 104680, 128233, 146552, 183190, 209360, 256466, 293104, 366380, 418720, 512932, 586208, 641165, 732760, 1025864, 1282330, 1465520, 2051728, 2564660, 2931040, 4103456, 5129320, 10258640, 20517280]

約数ペア:

[(1, 20517280), (2, 10258640), (4, 5129320), (5, 4103456), (7, 2931040), (8, 2564660), (10, 2051728), (14, 1465520), (16, 1282330), (20, 1025864), (28, 732760), (32, 641165), (35, 586208), (40, 512932), (49, 418720), (56, 366380), (70, 293104), (80, 256466), (98, 209360), (112, 183190), (140, 146552), (160, 128233), (196, 104680), (224, 91595), (245, 83744), (280, 73276), (392, 52340), (490, 41872), (560, 36638), (784, 26170), (980, 20936), (1120, 18319), (1568, 13085), (1960, 10468), (2617, 7840), (3920, 5234)]