18985420

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{11437}}^1$

素因数の和:11529

約数の個数: 24

約数和(自身を含む): 40353264

約数和(自身を除く): 21367844

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 11437, 22874, 45748, 57185, 114370, 228740, 949271, 1898542, 3797084, 4746355, 9492710, 18985420]

約数ペア:

[(1, 18985420), (2, 9492710), (4, 4746355), (5, 3797084), (10, 1898542), (20, 949271), (83, 228740), (166, 114370), (332, 57185), (415, 45748), (830, 22874), (1660, 11437)]