21376768

素因数分解:

$2^8\times 7^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 49710080

約数和(自身を除く): 28333312

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 79, 112, 128, 151, 158, 224, 256, 302, 316, 448, 553, 604, 632, 896, 1057, 1106, 1208, 1264, 1792, 2114, 2212, 2416, 2528, 4228, 4424, 4832, 5056, 8456, 8848, 9664, 10112, 11929, 16912, 17696, 19328, 20224, 23858, 33824, 35392, 38656, 47716, 67648, 70784, 83503, 95432, 135296, 141568, 167006, 190864, 270592, 334012, 381728, 668024, 763456, 1336048, 1526912, 2672096, 3053824, 5344192, 10688384, 21376768]

約数ペア:

[(1, 21376768), (2, 10688384), (4, 5344192), (7, 3053824), (8, 2672096), (14, 1526912), (16, 1336048), (28, 763456), (32, 668024), (56, 381728), (64, 334012), (79, 270592), (112, 190864), (128, 167006), (151, 141568), (158, 135296), (224, 95432), (256, 83503), (302, 70784), (316, 67648), (448, 47716), (553, 38656), (604, 35392), (632, 33824), (896, 23858), (1057, 20224), (1106, 19328), (1208, 17696), (1264, 16912), (1792, 11929), (2114, 10112), (2212, 9664), (2416, 8848), (2528, 8456), (4228, 5056), (4424, 4832)]