20982878

素因数分解:

$2^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{191}}^1$

素因数の和:285

約数の個数: 48

約数和(自身を含む): 39398400

約数和(自身を除く): 18415522

約数列:

[1, 2, 7, 14, 19, 38, 49, 59, 98, 118, 133, 191, 266, 382, 413, 826, 931, 1121, 1337, 1862, 2242, 2674, 2891, 3629, 5782, 7258, 7847, 9359, 11269, 15694, 18718, 22538, 25403, 50806, 54929, 78883, 109858, 157766, 177821, 214111, 355642, 428222, 552181, 1104362, 1498777, 2997554, 10491439, 20982878]

約数ペア:

[(1, 20982878), (2, 10491439), (7, 2997554), (14, 1498777), (19, 1104362), (38, 552181), (49, 428222), (59, 355642), (98, 214111), (118, 177821), (133, 157766), (191, 109858), (266, 78883), (382, 54929), (413, 50806), (826, 25403), (931, 22538), (1121, 18718), (1337, 15694), (1862, 11269), (2242, 9359), (2674, 7847), (2891, 7258), (3629, 5782)]