20978672

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:258

約数の個数: 80

約数和(自身を含む): 48934368

約数和(自身を除く): 27955696

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 44, 52, 53, 88, 104, 106, 143, 173, 176, 208, 212, 286, 346, 424, 572, 583, 689, 692, 848, 1144, 1166, 1378, 1384, 1903, 2249, 2288, 2332, 2756, 2768, 3806, 4498, 4664, 5512, 7579, 7612, 8996, 9169, 9328, 11024, 15158, 15224, 17992, 18338, 24739, 30316, 30448, 35984, 36676, 49478, 60632, 73352, 98956, 100859, 119197, 121264, 146704, 197912, 201718, 238394, 395824, 403436, 476788, 806872, 953576, 1311167, 1613744, 1907152, 2622334, 5244668, 10489336, 20978672]

約数ペア:

[(1, 20978672), (2, 10489336), (4, 5244668), (8, 2622334), (11, 1907152), (13, 1613744), (16, 1311167), (22, 953576), (26, 806872), (44, 476788), (52, 403436), (53, 395824), (88, 238394), (104, 201718), (106, 197912), (143, 146704), (173, 121264), (176, 119197), (208, 100859), (212, 98956), (286, 73352), (346, 60632), (424, 49478), (572, 36676), (583, 35984), (689, 30448), (692, 30316), (848, 24739), (1144, 18338), (1166, 17992), (1378, 15224), (1384, 15158), (1903, 11024), (2249, 9328), (2288, 9169), (2332, 8996), (2756, 7612), (2768, 7579), (3806, 5512), (4498, 4664)]