20647788

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{373}}^1\times {\mathrm{659}}^1$

素因数の和:1046

約数の個数: 48

約数和(自身を含む): 55292160

約数和(自身を除く): 34644372

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 373, 659, 746, 1119, 1318, 1492, 1977, 2238, 2611, 2636, 3954, 4476, 4613, 5222, 7833, 7908, 9226, 10444, 13839, 15666, 18452, 27678, 31332, 55356, 245807, 491614, 737421, 983228, 1474842, 1720649, 2949684, 3441298, 5161947, 6882596, 10323894, 20647788]

約数ペア:

[(1, 20647788), (2, 10323894), (3, 6882596), (4, 5161947), (6, 3441298), (7, 2949684), (12, 1720649), (14, 1474842), (21, 983228), (28, 737421), (42, 491614), (84, 245807), (373, 55356), (659, 31332), (746, 27678), (1119, 18452), (1318, 15666), (1492, 13839), (1977, 10444), (2238, 9226), (2611, 7908), (2636, 7833), (3954, 5222), (4476, 4613)]