21166520

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 50155200

約数和(自身を除く): 28988680

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 71, 116, 142, 145, 232, 257, 284, 290, 355, 514, 568, 580, 710, 1028, 1160, 1285, 1420, 2056, 2059, 2570, 2840, 4118, 5140, 7453, 8236, 10280, 10295, 14906, 16472, 18247, 20590, 29812, 36494, 37265, 41180, 59624, 72988, 74530, 82360, 91235, 145976, 149060, 182470, 298120, 364940, 529163, 729880, 1058326, 2116652, 2645815, 4233304, 5291630, 10583260, 21166520]

約数ペア:

[(1, 21166520), (2, 10583260), (4, 5291630), (5, 4233304), (8, 2645815), (10, 2116652), (20, 1058326), (29, 729880), (40, 529163), (58, 364940), (71, 298120), (116, 182470), (142, 149060), (145, 145976), (232, 91235), (257, 82360), (284, 74530), (290, 72988), (355, 59624), (514, 41180), (568, 37265), (580, 36494), (710, 29812), (1028, 20590), (1160, 18247), (1285, 16472), (1420, 14906), (2056, 10295), (2059, 10280), (2570, 8236), (2840, 7453), (4118, 5140)]