21287672

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{379}}^1$

素因数の和:468

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 27960328

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 34, 56, 59, 68, 118, 119, 136, 236, 238, 379, 413, 472, 476, 758, 826, 952, 1003, 1516, 1652, 2006, 2653, 3032, 3304, 4012, 5306, 6443, 7021, 8024, 10612, 12886, 14042, 21224, 22361, 25772, 28084, 44722, 45101, 51544, 56168, 89444, 90202, 156527, 178888, 180404, 313054, 360808, 380137, 626108, 760274, 1252216, 1520548, 2660959, 3041096, 5321918, 10643836, 21287672]

約数ペア:

[(1, 21287672), (2, 10643836), (4, 5321918), (7, 3041096), (8, 2660959), (14, 1520548), (17, 1252216), (28, 760274), (34, 626108), (56, 380137), (59, 360808), (68, 313054), (118, 180404), (119, 178888), (136, 156527), (236, 90202), (238, 89444), (379, 56168), (413, 51544), (472, 45101), (476, 44722), (758, 28084), (826, 25772), (952, 22361), (1003, 21224), (1516, 14042), (1652, 12886), (2006, 10612), (2653, 8024), (3032, 7021), (3304, 6443), (4012, 5306)]