19872040

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4643}}^1$

素因数の和:4761

約数の個数: 32

約数和(自身を含む): 45139680

約数和(自身を除く): 25267640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4643, 9286, 18572, 23215, 37144, 46430, 92860, 185720, 496801, 993602, 1987204, 2484005, 3974408, 4968010, 9936020, 19872040]

約数ペア:

[(1, 19872040), (2, 9936020), (4, 4968010), (5, 3974408), (8, 2484005), (10, 1987204), (20, 993602), (40, 496801), (107, 185720), (214, 92860), (428, 46430), (535, 37144), (856, 23215), (1070, 18572), (2140, 9286), (4280, 4643)]