18870005

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2131}}^1$

素因数の和:2177

約数の個数: 32

約数和(自身を含む): 29472768

約数和(自身を除く): 10602763

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 115, 161, 253, 385, 805, 1265, 1771, 2131, 8855, 10655, 14917, 23441, 49013, 74585, 117205, 164087, 245065, 343091, 539143, 820435, 1715455, 2695715, 3774001, 18870005]

約数ペア:

[(1, 18870005), (5, 3774001), (7, 2695715), (11, 1715455), (23, 820435), (35, 539143), (55, 343091), (77, 245065), (115, 164087), (161, 117205), (253, 74585), (385, 49013), (805, 23441), (1265, 14917), (1771, 10655), (2131, 8855)]