20700080

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6311}}^1$

素因数の和:6365

約数の個数: 40

約数和(自身を含む): 49309344

約数和(自身を除く): 28609264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6311, 12622, 25244, 31555, 50488, 63110, 100976, 126220, 252440, 258751, 504880, 517502, 1035004, 1293755, 2070008, 2587510, 4140016, 5175020, 10350040, 20700080]

約数ペア:

[(1, 20700080), (2, 10350040), (4, 5175020), (5, 4140016), (8, 2587510), (10, 2070008), (16, 1293755), (20, 1035004), (40, 517502), (41, 504880), (80, 258751), (82, 252440), (164, 126220), (205, 100976), (328, 63110), (410, 50488), (656, 31555), (820, 25244), (1640, 12622), (3280, 6311)]