21131986

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:546

約数の個数: 32

約数和(自身を含む): 35676288

約数和(自身を除く): 14544302

約数列:

[1, 2, 17, 23, 34, 46, 61, 122, 391, 443, 782, 886, 1037, 1403, 2074, 2806, 7531, 10189, 15062, 20378, 23851, 27023, 47702, 54046, 173213, 346426, 459391, 621529, 918782, 1243058, 10565993, 21131986]

約数ペア:

[(1, 21131986), (2, 10565993), (17, 1243058), (23, 918782), (34, 621529), (46, 459391), (61, 346426), (122, 173213), (391, 54046), (443, 47702), (782, 27023), (886, 23851), (1037, 20378), (1403, 15062), (2074, 10189), (2806, 7531)]