81344080

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{4051}}^1$

素因数の和:4315

約数の個数: 40

約数和(自身を含む): 189925344

約数和(自身を除く): 108581264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1255, 2008, 2510, 4016, 4051, 5020, 8102, 10040, 16204, 20080, 20255, 32408, 40510, 64816, 81020, 162040, 324080, 1016801, 2033602, 4067204, 5084005, 8134408, 10168010, 16268816, 20336020, 40672040, 81344080]

約数ペア:

[(1, 81344080), (2, 40672040), (4, 20336020), (5, 16268816), (8, 10168010), (10, 8134408), (16, 5084005), (20, 4067204), (40, 2033602), (80, 1016801), (251, 324080), (502, 162040), (1004, 81020), (1255, 64816), (2008, 40510), (2510, 32408), (4016, 20255), (4051, 20080), (5020, 16204), (8102, 10040)]