18897548

素因数分解:

$2^2\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{487}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 33818400

約数和(自身を除く): 14920852

約数列:

[1, 2, 4, 89, 109, 178, 218, 356, 436, 487, 974, 1948, 9701, 19402, 38804, 43343, 53083, 86686, 106166, 173372, 212332, 4724387, 9448774, 18897548]

約数ペア:

[(1, 18897548), (2, 9448774), (4, 4724387), (89, 212332), (109, 173372), (178, 106166), (218, 86686), (356, 53083), (436, 43343), (487, 38804), (974, 19402), (1948, 9701)]