20856700

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{5087}}^1$

素因数の和:5142

約数の個数: 36

約数和(自身を含む): 46372032

約数和(自身を除く): 25515332

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 2050, 4100, 5087, 10174, 20348, 25435, 50870, 101740, 127175, 208567, 254350, 417134, 508700, 834268, 1042835, 2085670, 4171340, 5214175, 10428350, 20856700]

約数ペア:

[(1, 20856700), (2, 10428350), (4, 5214175), (5, 4171340), (10, 2085670), (20, 1042835), (25, 834268), (41, 508700), (50, 417134), (82, 254350), (100, 208567), (164, 127175), (205, 101740), (410, 50870), (820, 25435), (1025, 20348), (2050, 10174), (4100, 5087)]