20718544

素因数分解:

$2^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:344

約数の個数: 80

約数和(自身を含む): 50996736

約数和(自身を除く): 30278192

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 56, 67, 77, 88, 112, 134, 154, 176, 251, 268, 308, 469, 502, 536, 616, 737, 938, 1004, 1072, 1232, 1474, 1757, 1876, 2008, 2761, 2948, 3514, 3752, 4016, 5159, 5522, 5896, 7028, 7504, 10318, 11044, 11792, 14056, 16817, 19327, 20636, 22088, 28112, 33634, 38654, 41272, 44176, 67268, 77308, 82544, 117719, 134536, 154616, 184987, 235438, 269072, 309232, 369974, 470876, 739948, 941752, 1294909, 1479896, 1883504, 2589818, 2959792, 5179636, 10359272, 20718544]

約数ペア:

[(1, 20718544), (2, 10359272), (4, 5179636), (7, 2959792), (8, 2589818), (11, 1883504), (14, 1479896), (16, 1294909), (22, 941752), (28, 739948), (44, 470876), (56, 369974), (67, 309232), (77, 269072), (88, 235438), (112, 184987), (134, 154616), (154, 134536), (176, 117719), (251, 82544), (268, 77308), (308, 67268), (469, 44176), (502, 41272), (536, 38654), (616, 33634), (737, 28112), (938, 22088), (1004, 20636), (1072, 19327), (1232, 16817), (1474, 14056), (1757, 11792), (1876, 11044), (2008, 10318), (2761, 7504), (2948, 7028), (3514, 5896), (3752, 5522), (4016, 5159)]