21009978

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{3659}}^1$

素因数の和:3707

約数の個数: 48

約数和(自身を含む): 51386400

約数和(自身を除く): 30376422

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 29, 33, 58, 66, 87, 99, 174, 198, 261, 319, 522, 638, 957, 1914, 2871, 3659, 5742, 7318, 10977, 21954, 32931, 40249, 65862, 80498, 106111, 120747, 212222, 241494, 318333, 362241, 636666, 724482, 954999, 1167221, 1909998, 2334442, 3501663, 7003326, 10504989, 21009978]

約数ペア:

[(1, 21009978), (2, 10504989), (3, 7003326), (6, 3501663), (9, 2334442), (11, 1909998), (18, 1167221), (22, 954999), (29, 724482), (33, 636666), (58, 362241), (66, 318333), (87, 241494), (99, 212222), (174, 120747), (198, 106111), (261, 80498), (319, 65862), (522, 40249), (638, 32931), (957, 21954), (1914, 10977), (2871, 7318), (3659, 5742)]