18537701

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{521}}^1$

素因数の和:581

約数の個数: 32

約数和(自身を含む): 25256448

約数和(自身を除く): 6718747

約数列:

[1, 7, 13, 17, 23, 91, 119, 161, 221, 299, 391, 521, 1547, 2093, 2737, 3647, 5083, 6773, 8857, 11983, 35581, 47411, 61999, 83881, 115141, 155779, 203711, 805987, 1090453, 1425977, 2648243, 18537701]

約数ペア:

[(1, 18537701), (7, 2648243), (13, 1425977), (17, 1090453), (23, 805987), (91, 203711), (119, 155779), (161, 115141), (221, 83881), (299, 61999), (391, 47411), (521, 35581), (1547, 11983), (2093, 8857), (2737, 6773), (3647, 5083)]