18643219

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{313}}^1$

素因数の和:514

約数の個数: 16

約数和(自身を含む): 21864448

約数和(自身を除く): 3221229

約数列:

[1, 7, 67, 127, 313, 469, 889, 2191, 8509, 20971, 39751, 59563, 146797, 278257, 2663317, 18643219]

約数ペア:

[(1, 18643219), (7, 2663317), (67, 278257), (127, 146797), (313, 59563), (469, 39751), (889, 20971), (2191, 8509)]