20517728

素因数分解:

$2^5\times 7^1\times {\mathrm{11}}^2\times {\mathrm{757}}^1$

素因数の和:796

約数の個数: 72

約数和(自身を含む): 50810256

約数和(自身を除く): 30292528

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 56, 77, 88, 112, 121, 154, 176, 224, 242, 308, 352, 484, 616, 757, 847, 968, 1232, 1514, 1694, 1936, 2464, 3028, 3388, 3872, 5299, 6056, 6776, 8327, 10598, 12112, 13552, 16654, 21196, 24224, 27104, 33308, 42392, 58289, 66616, 84784, 91597, 116578, 133232, 169568, 183194, 233156, 266464, 366388, 466312, 641179, 732776, 932624, 1282358, 1465552, 1865248, 2564716, 2931104, 5129432, 10258864, 20517728]

約数ペア:

[(1, 20517728), (2, 10258864), (4, 5129432), (7, 2931104), (8, 2564716), (11, 1865248), (14, 1465552), (16, 1282358), (22, 932624), (28, 732776), (32, 641179), (44, 466312), (56, 366388), (77, 266464), (88, 233156), (112, 183194), (121, 169568), (154, 133232), (176, 116578), (224, 91597), (242, 84784), (308, 66616), (352, 58289), (484, 42392), (616, 33308), (757, 27104), (847, 24224), (968, 21196), (1232, 16654), (1514, 13552), (1694, 12112), (1936, 10598), (2464, 8327), (3028, 6776), (3388, 6056), (3872, 5299)]