20856205

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^2$

素因数の和:205

約数の個数: 24

約数和(自身を含む): 27237600

約数和(自身を除く): 6381395

約数列:

[1, 5, 19, 59, 61, 95, 295, 305, 1121, 1159, 3599, 3721, 5605, 5795, 17995, 18605, 68381, 70699, 219539, 341905, 353495, 1097695, 4171241, 20856205]

約数ペア:

[(1, 20856205), (5, 4171241), (19, 1097695), (59, 353495), (61, 341905), (95, 219539), (295, 70699), (305, 68381), (1121, 18605), (1159, 17995), (3599, 5795), (3721, 5605)]