18999898

素因数分解:

$2^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1\times {\mathrm{617}}^1$

素因数の和:881

約数の個数: 16

約数和(自身を含む): 29033640

約数和(自身を除く): 10033742

約数列:

[1, 2, 89, 173, 178, 346, 617, 1234, 15397, 30794, 54913, 106741, 109826, 213482, 9499949, 18999898]

約数ペア:

[(1, 18999898), (2, 9499949), (89, 213482), (173, 109826), (178, 106741), (346, 54913), (617, 30794), (1234, 15397)]