21371295

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{401}}^1$

素因数の和:456

約数の個数: 64

約数和(自身を含む): 41679360

約数和(自身を除く): 20308065

約数列:

[1, 3, 5, 11, 15, 17, 19, 33, 51, 55, 57, 85, 95, 165, 187, 209, 255, 285, 323, 401, 561, 627, 935, 969, 1045, 1203, 1615, 2005, 2805, 3135, 3553, 4411, 4845, 6015, 6817, 7619, 10659, 13233, 17765, 20451, 22055, 22857, 34085, 38095, 53295, 66165, 74987, 83809, 102255, 114285, 129523, 224961, 251427, 374935, 388569, 419045, 647615, 1124805, 1257135, 1424753, 1942845, 4274259, 7123765, 21371295]

約数ペア:

[(1, 21371295), (3, 7123765), (5, 4274259), (11, 1942845), (15, 1424753), (17, 1257135), (19, 1124805), (33, 647615), (51, 419045), (55, 388569), (57, 374935), (85, 251427), (95, 224961), (165, 129523), (187, 114285), (209, 102255), (255, 83809), (285, 74987), (323, 66165), (401, 53295), (561, 38095), (627, 34085), (935, 22857), (969, 22055), (1045, 20451), (1203, 17765), (1615, 13233), (2005, 10659), (2805, 7619), (3135, 6817), (3553, 6015), (4411, 4845)]