20504799

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:181

約数の個数: 64

約数和(自身を含む): 37324800

約数和(自身を除く): 16820001

約数列:

[1, 3, 7, 9, 21, 23, 27, 53, 63, 69, 89, 159, 161, 189, 207, 267, 371, 477, 483, 621, 623, 801, 1113, 1219, 1431, 1449, 1869, 2047, 2403, 3339, 3657, 4347, 4717, 5607, 6141, 8533, 10017, 10971, 14151, 14329, 16821, 18423, 25599, 32913, 33019, 42453, 42987, 55269, 76797, 99057, 108491, 127359, 128961, 230391, 297171, 325473, 386883, 759437, 891513, 976419, 2278311, 2929257, 6834933, 20504799]

約数ペア:

[(1, 20504799), (3, 6834933), (7, 2929257), (9, 2278311), (21, 976419), (23, 891513), (27, 759437), (53, 386883), (63, 325473), (69, 297171), (89, 230391), (159, 128961), (161, 127359), (189, 108491), (207, 99057), (267, 76797), (371, 55269), (477, 42987), (483, 42453), (621, 33019), (623, 32913), (801, 25599), (1113, 18423), (1219, 16821), (1431, 14329), (1449, 14151), (1869, 10971), (2047, 10017), (2403, 8533), (3339, 6141), (3657, 5607), (4347, 4717)]