18877985

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2657}}^1$

素因数の和:2705

約数の個数: 24

約数和(自身を含む): 27271080

約数和(自身を除く): 8393095

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 2657, 7105, 13285, 18599, 77053, 92995, 130193, 385265, 539371, 650965, 2696855, 3775597, 18877985]

約数ペア:

[(1, 18877985), (5, 3775597), (7, 2696855), (29, 650965), (35, 539371), (49, 385265), (145, 130193), (203, 92995), (245, 77053), (1015, 18599), (1421, 13285), (2657, 7105)]