21692690

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{337}}^1$

素因数の和:542

約数の個数: 32

約数和(自身を含む): 40373424

約数和(自身を除く): 18680734

約数列:

[1, 2, 5, 10, 41, 82, 157, 205, 314, 337, 410, 674, 785, 1570, 1685, 3370, 6437, 12874, 13817, 27634, 32185, 52909, 64370, 69085, 105818, 138170, 264545, 529090, 2169269, 4338538, 10846345, 21692690]

約数ペア:

[(1, 21692690), (2, 10846345), (5, 4338538), (10, 2169269), (41, 529090), (82, 264545), (157, 138170), (205, 105818), (314, 69085), (337, 64370), (410, 52909), (674, 32185), (785, 27634), (1570, 13817), (1685, 12874), (3370, 6437)]