21720496

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{173}}^1$

素因数の和:266

約数の個数: 80

約数和(自身を含む): 51782400

約数和(自身を除く): 30061904

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 59, 76, 112, 118, 133, 152, 173, 236, 266, 304, 346, 413, 472, 532, 692, 826, 944, 1064, 1121, 1211, 1384, 1652, 2128, 2242, 2422, 2768, 3287, 3304, 4484, 4844, 6574, 6608, 7847, 8968, 9688, 10207, 13148, 15694, 17936, 19376, 20414, 23009, 26296, 31388, 40828, 46018, 52592, 62776, 71449, 81656, 92036, 125552, 142898, 163312, 184072, 193933, 285796, 368144, 387866, 571592, 775732, 1143184, 1357531, 1551464, 2715062, 3102928, 5430124, 10860248, 21720496]

約数ペア:

[(1, 21720496), (2, 10860248), (4, 5430124), (7, 3102928), (8, 2715062), (14, 1551464), (16, 1357531), (19, 1143184), (28, 775732), (38, 571592), (56, 387866), (59, 368144), (76, 285796), (112, 193933), (118, 184072), (133, 163312), (152, 142898), (173, 125552), (236, 92036), (266, 81656), (304, 71449), (346, 62776), (413, 52592), (472, 46018), (532, 40828), (692, 31388), (826, 26296), (944, 23009), (1064, 20414), (1121, 19376), (1211, 17936), (1384, 15694), (1652, 13148), (2128, 10207), (2242, 9688), (2422, 8968), (2768, 7847), (3287, 6608), (3304, 6574), (4484, 4844)]