20625488

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{307}}^1$

素因数の和:364

約数の個数: 80

約数和(自身を含む): 48121920

約数和(自身を除く): 27496432

約数列:

[1, 2, 4, 8, 13, 16, 17, 19, 26, 34, 38, 52, 68, 76, 104, 136, 152, 208, 221, 247, 272, 304, 307, 323, 442, 494, 614, 646, 884, 988, 1228, 1292, 1768, 1976, 2456, 2584, 3536, 3952, 3991, 4199, 4912, 5168, 5219, 5833, 7982, 8398, 10438, 11666, 15964, 16796, 20876, 23332, 31928, 33592, 41752, 46664, 63856, 67184, 67847, 75829, 83504, 93328, 99161, 135694, 151658, 198322, 271388, 303316, 396644, 542776, 606632, 793288, 1085552, 1213264, 1289093, 1586576, 2578186, 5156372, 10312744, 20625488]

約数ペア:

[(1, 20625488), (2, 10312744), (4, 5156372), (8, 2578186), (13, 1586576), (16, 1289093), (17, 1213264), (19, 1085552), (26, 793288), (34, 606632), (38, 542776), (52, 396644), (68, 303316), (76, 271388), (104, 198322), (136, 151658), (152, 135694), (208, 99161), (221, 93328), (247, 83504), (272, 75829), (304, 67847), (307, 67184), (323, 63856), (442, 46664), (494, 41752), (614, 33592), (646, 31928), (884, 23332), (988, 20876), (1228, 16796), (1292, 15964), (1768, 11666), (1976, 10438), (2456, 8398), (2584, 7982), (3536, 5833), (3952, 5219), (3991, 5168), (4199, 4912)]