21136916

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{271}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 41674752

約数和(自身を除く): 20537836

約数列:

[1, 2, 4, 17, 31, 34, 37, 62, 68, 74, 124, 148, 271, 527, 542, 629, 1054, 1084, 1147, 1258, 2108, 2294, 2516, 4588, 4607, 8401, 9214, 10027, 16802, 18428, 19499, 20054, 33604, 38998, 40108, 77996, 142817, 170459, 285634, 310837, 340918, 571268, 621674, 681836, 1243348, 5284229, 10568458, 21136916]

約数ペア:

[(1, 21136916), (2, 10568458), (4, 5284229), (17, 1243348), (31, 681836), (34, 621674), (37, 571268), (62, 340918), (68, 310837), (74, 285634), (124, 170459), (148, 142817), (271, 77996), (527, 40108), (542, 38998), (629, 33604), (1054, 20054), (1084, 19499), (1147, 18428), (1258, 16802), (2108, 10027), (2294, 9214), (2516, 8401), (4588, 4607)]