81663520

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{26863}}^1$

素因数の和:26897

約数の個数: 48

約数和(自身を含む): 203091840

約数和(自身を除く): 121428320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 26863, 53726, 107452, 134315, 214904, 268630, 429808, 510397, 537260, 859616, 1020794, 1074520, 2041588, 2149040, 2551985, 4083176, 4298080, 5103970, 8166352, 10207940, 16332704, 20415880, 40831760, 81663520]

約数ペア:

[(1, 81663520), (2, 40831760), (4, 20415880), (5, 16332704), (8, 10207940), (10, 8166352), (16, 5103970), (19, 4298080), (20, 4083176), (32, 2551985), (38, 2149040), (40, 2041588), (76, 1074520), (80, 1020794), (95, 859616), (152, 537260), (160, 510397), (190, 429808), (304, 268630), (380, 214904), (608, 134315), (760, 107452), (1520, 53726), (3040, 26863)]