28684509

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:162

約数の個数: 64

約数和(自身を含む): 49612800

約数和(自身を除く): 20928291

約数列:

[1, 3, 7, 19, 21, 29, 37, 57, 67, 87, 111, 133, 201, 203, 259, 399, 469, 551, 609, 703, 777, 1073, 1273, 1407, 1653, 1943, 2109, 2479, 3219, 3819, 3857, 4921, 5829, 7437, 7511, 8911, 11571, 13601, 14763, 17353, 20387, 22533, 26733, 36917, 40803, 47101, 52059, 61161, 71891, 110751, 141303, 142709, 215673, 258419, 329707, 428127, 503237, 775257, 989121, 1365929, 1509711, 4097787, 9561503, 28684509]

約数ペア:

[(1, 28684509), (3, 9561503), (7, 4097787), (19, 1509711), (21, 1365929), (29, 989121), (37, 775257), (57, 503237), (67, 428127), (87, 329707), (111, 258419), (133, 215673), (201, 142709), (203, 141303), (259, 110751), (399, 71891), (469, 61161), (551, 52059), (609, 47101), (703, 40803), (777, 36917), (1073, 26733), (1273, 22533), (1407, 20387), (1653, 17353), (1943, 14763), (2109, 13601), (2479, 11571), (3219, 8911), (3819, 7511), (3857, 7437), (4921, 5829)]