19990657

素因数分解:

${\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:153

約数の個数: 32

約数和(自身を含む): 23950080

約数和(自身を除く): 3959423

約数列:

[1, 17, 23, 29, 41, 43, 391, 493, 667, 697, 731, 943, 989, 1189, 1247, 1763, 11339, 16031, 16813, 20213, 21199, 27347, 28681, 29971, 40549, 51127, 464899, 487577, 689333, 869159, 1175921, 19990657]

約数ペア:

[(1, 19990657), (17, 1175921), (23, 869159), (29, 689333), (41, 487577), (43, 464899), (391, 51127), (493, 40549), (667, 29971), (697, 28681), (731, 27347), (943, 21199), (989, 20213), (1189, 16813), (1247, 16031), (1763, 11339)]