20477912

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1223}}^1$

素因数の和:1272

約数の個数: 64

約数和(自身を含む): 49351680

約数和(自身を除く): 28873768

約数列:

[1, 2, 4, 7, 8, 13, 14, 23, 26, 28, 46, 52, 56, 91, 92, 104, 161, 182, 184, 299, 322, 364, 598, 644, 728, 1196, 1223, 1288, 2093, 2392, 2446, 4186, 4892, 8372, 8561, 9784, 15899, 16744, 17122, 28129, 31798, 34244, 56258, 63596, 68488, 111293, 112516, 127192, 196903, 222586, 225032, 365677, 393806, 445172, 731354, 787612, 890344, 1462708, 1575224, 2559739, 2925416, 5119478, 10238956, 20477912]

約数ペア:

[(1, 20477912), (2, 10238956), (4, 5119478), (7, 2925416), (8, 2559739), (13, 1575224), (14, 1462708), (23, 890344), (26, 787612), (28, 731354), (46, 445172), (52, 393806), (56, 365677), (91, 225032), (92, 222586), (104, 196903), (161, 127192), (182, 112516), (184, 111293), (299, 68488), (322, 63596), (364, 56258), (598, 34244), (644, 31798), (728, 28129), (1196, 17122), (1223, 16744), (1288, 15899), (2093, 9784), (2392, 8561), (2446, 8372), (4186, 4892)]