21254233

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1249}}^1$

素因数の和:1297

約数の個数: 32

約数和(自身を含む): 30240000

約数和(自身を除く): 8985767

約数列:

[1, 7, 11, 13, 17, 77, 91, 119, 143, 187, 221, 1001, 1249, 1309, 1547, 2431, 8743, 13739, 16237, 17017, 21233, 96173, 113659, 148631, 178607, 233563, 276029, 1250249, 1634941, 1932203, 3036319, 21254233]

約数ペア:

[(1, 21254233), (7, 3036319), (11, 1932203), (13, 1634941), (17, 1250249), (77, 276029), (91, 233563), (119, 178607), (143, 148631), (187, 113659), (221, 96173), (1001, 21233), (1249, 17017), (1309, 16237), (1547, 13739), (2431, 8743)]