20406890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{727}}^1$

素因数の和:1142

約数の個数: 32

約数和(自身を含む): 42142464

約数和(自身を除く): 21735574

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 401, 727, 802, 1454, 2005, 2807, 3635, 4010, 5089, 5614, 7270, 10178, 14035, 25445, 28070, 50890, 291527, 583054, 1457635, 2040689, 2915270, 4081378, 10203445, 20406890]

約数ペア:

[(1, 20406890), (2, 10203445), (5, 4081378), (7, 2915270), (10, 2040689), (14, 1457635), (35, 583054), (70, 291527), (401, 50890), (727, 28070), (802, 25445), (1454, 14035), (2005, 10178), (2807, 7270), (3635, 5614), (4010, 5089)]