20617688

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{223}}^1$

素因数の和:376

約数の個数: 64

約数和(自身を含む): 48168960

約数和(自身を除く): 27551272

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 127, 182, 223, 254, 364, 446, 508, 728, 889, 892, 1016, 1561, 1651, 1778, 1784, 2899, 3122, 3302, 3556, 5798, 6244, 6604, 7112, 11557, 11596, 12488, 13208, 20293, 23114, 23192, 28321, 40586, 46228, 56642, 81172, 92456, 113284, 162344, 198247, 226568, 368173, 396494, 736346, 792988, 1472692, 1585976, 2577211, 2945384, 5154422, 10308844, 20617688]

約数ペア:

[(1, 20617688), (2, 10308844), (4, 5154422), (7, 2945384), (8, 2577211), (13, 1585976), (14, 1472692), (26, 792988), (28, 736346), (52, 396494), (56, 368173), (91, 226568), (104, 198247), (127, 162344), (182, 113284), (223, 92456), (254, 81172), (364, 56642), (446, 46228), (508, 40586), (728, 28321), (889, 23192), (892, 23114), (1016, 20293), (1561, 13208), (1651, 12488), (1778, 11596), (1784, 11557), (2899, 7112), (3122, 6604), (3302, 6244), (3556, 5798)]