21398769

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{101}}^1$

素因数の和:195

約数の個数: 64

約数和(自身を含む): 39168000

約数和(自身を除く): 17769231

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 59, 63, 101, 133, 171, 177, 189, 303, 399, 413, 513, 531, 707, 909, 1121, 1197, 1239, 1593, 1919, 2121, 2727, 3363, 3591, 3717, 5757, 5959, 6363, 7847, 10089, 11151, 13433, 17271, 17877, 19089, 23541, 30267, 40299, 41713, 51813, 53631, 70623, 113221, 120897, 125139, 160893, 211869, 339663, 362691, 375417, 792547, 1018989, 1126251, 2377641, 3056967, 7132923, 21398769]

約数ペア:

[(1, 21398769), (3, 7132923), (7, 3056967), (9, 2377641), (19, 1126251), (21, 1018989), (27, 792547), (57, 375417), (59, 362691), (63, 339663), (101, 211869), (133, 160893), (171, 125139), (177, 120897), (189, 113221), (303, 70623), (399, 53631), (413, 51813), (513, 41713), (531, 40299), (707, 30267), (909, 23541), (1121, 19089), (1197, 17877), (1239, 17271), (1593, 13433), (1919, 11151), (2121, 10089), (2727, 7847), (3363, 6363), (3591, 5959), (3717, 5757)]