21980488

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{263}}^1\times {\mathrm{337}}^1$

素因数の和:637

約数の個数: 32

約数和(自身を含む): 42831360

約数和(自身を除く): 20850872

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 263, 337, 526, 674, 1052, 1348, 2104, 2696, 8153, 10447, 16306, 20894, 32612, 41788, 65224, 83576, 88631, 177262, 354524, 709048, 2747561, 5495122, 10990244, 21980488]

約数ペア:

[(1, 21980488), (2, 10990244), (4, 5495122), (8, 2747561), (31, 709048), (62, 354524), (124, 177262), (248, 88631), (263, 83576), (337, 65224), (526, 41788), (674, 32612), (1052, 20894), (1348, 16306), (2104, 10447), (2696, 8153)]