18851440

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{3863}}^1$

素因数の和:3937

約数の個数: 40

約数和(自身を含む): 44559648

約数和(自身を除く): 25708208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 3863, 4880, 7726, 15452, 19315, 30904, 38630, 61808, 77260, 154520, 235643, 309040, 471286, 942572, 1178215, 1885144, 2356430, 3770288, 4712860, 9425720, 18851440]

約数ペア:

[(1, 18851440), (2, 9425720), (4, 4712860), (5, 3770288), (8, 2356430), (10, 1885144), (16, 1178215), (20, 942572), (40, 471286), (61, 309040), (80, 235643), (122, 154520), (244, 77260), (305, 61808), (488, 38630), (610, 30904), (976, 19315), (1220, 15452), (2440, 7726), (3863, 4880)]