211980769

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{12457}}^1$

素因数の和:12505

約数の個数: 32

約数和(自身を含む): 301383936

約数和(自身を除く): 89403167

約数列:

[1, 7, 11, 13, 17, 77, 91, 119, 143, 187, 221, 1001, 1309, 1547, 2431, 12457, 17017, 87199, 137027, 161941, 211769, 959189, 1133587, 1482383, 1781351, 2329459, 2752997, 12469457, 16306213, 19270979, 30282967, 211980769]

約数ペア:

[(1, 211980769), (7, 30282967), (11, 19270979), (13, 16306213), (17, 12469457), (77, 2752997), (91, 2329459), (119, 1781351), (143, 1482383), (187, 1133587), (221, 959189), (1001, 211769), (1309, 161941), (1547, 137027), (2431, 87199), (12457, 17017)]