20978356

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{839}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 45158400

約数和(自身を除く): 24180044

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 47, 76, 94, 133, 188, 266, 329, 532, 658, 839, 893, 1316, 1678, 1786, 3356, 3572, 5873, 6251, 11746, 12502, 15941, 23492, 25004, 31882, 39433, 63764, 78866, 111587, 157732, 223174, 276031, 446348, 552062, 749227, 1104124, 1498454, 2996908, 5244589, 10489178, 20978356]

約数ペア:

[(1, 20978356), (2, 10489178), (4, 5244589), (7, 2996908), (14, 1498454), (19, 1104124), (28, 749227), (38, 552062), (47, 446348), (76, 276031), (94, 223174), (133, 157732), (188, 111587), (266, 78866), (329, 63764), (532, 39433), (658, 31882), (839, 25004), (893, 23492), (1316, 15941), (1678, 12502), (1786, 11746), (3356, 6251), (3572, 5873)]