81681440

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8369}}^1$

素因数の和:8445

約数の個数: 48

約数和(自身を含む): 196159320

約数和(自身を除く): 114477880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2440, 4880, 8369, 9760, 16738, 33476, 41845, 66952, 83690, 133904, 167380, 267808, 334760, 510509, 669520, 1021018, 1339040, 2042036, 2552545, 4084072, 5105090, 8168144, 10210180, 16336288, 20420360, 40840720, 81681440]

約数ペア:

[(1, 81681440), (2, 40840720), (4, 20420360), (5, 16336288), (8, 10210180), (10, 8168144), (16, 5105090), (20, 4084072), (32, 2552545), (40, 2042036), (61, 1339040), (80, 1021018), (122, 669520), (160, 510509), (244, 334760), (305, 267808), (488, 167380), (610, 133904), (976, 83690), (1220, 66952), (1952, 41845), (2440, 33476), (4880, 16738), (8369, 9760)]