20980728

素因数分解:

$2^3\times 3^3\times {\mathrm{137}}^1\times {\mathrm{709}}^1$

素因数の和:861

約数の個数: 64

約数和(自身を含む): 58788000

約数和(自身を除く): 37807272

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, 137, 216, 274, 411, 548, 709, 822, 1096, 1233, 1418, 1644, 2127, 2466, 2836, 3288, 3699, 4254, 4932, 5672, 6381, 7398, 8508, 9864, 12762, 14796, 17016, 19143, 25524, 29592, 38286, 51048, 76572, 97133, 153144, 194266, 291399, 388532, 582798, 777064, 874197, 1165596, 1748394, 2331192, 2622591, 3496788, 5245182, 6993576, 10490364, 20980728]

約数ペア:

[(1, 20980728), (2, 10490364), (3, 6993576), (4, 5245182), (6, 3496788), (8, 2622591), (9, 2331192), (12, 1748394), (18, 1165596), (24, 874197), (27, 777064), (36, 582798), (54, 388532), (72, 291399), (108, 194266), (137, 153144), (216, 97133), (274, 76572), (411, 51048), (548, 38286), (709, 29592), (822, 25524), (1096, 19143), (1233, 17016), (1418, 14796), (1644, 12762), (2127, 9864), (2466, 8508), (2836, 7398), (3288, 6381), (3699, 5672), (4254, 4932)]