256156784

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{64817}}^1$

素因数の和:64857

約数の個数: 40

約数和(自身を含む): 562620240

約数和(自身を除く): 306463456

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 64817, 129634, 259268, 518536, 842621, 1037072, 1231523, 1685242, 2463046, 3370484, 4926092, 6740968, 9852184, 13481936, 16009799, 19704368, 32019598, 64039196, 128078392, 256156784]

約数ペア:

[(1, 256156784), (2, 128078392), (4, 64039196), (8, 32019598), (13, 19704368), (16, 16009799), (19, 13481936), (26, 9852184), (38, 6740968), (52, 4926092), (76, 3370484), (104, 2463046), (152, 1685242), (208, 1231523), (247, 1037072), (304, 842621), (494, 518536), (988, 259268), (1976, 129634), (3952, 64817)]