19715715

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{443}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 36571392

約数和(自身を除く): 16855677

約数列:

[1, 3, 5, 9, 15, 23, 43, 45, 69, 115, 129, 207, 215, 345, 387, 443, 645, 989, 1035, 1329, 1935, 2215, 2967, 3987, 4945, 6645, 8901, 10189, 14835, 19049, 19935, 30567, 44505, 50945, 57147, 91701, 95245, 152835, 171441, 285735, 438127, 458505, 857205, 1314381, 2190635, 3943143, 6571905, 19715715]

約数ペア:

[(1, 19715715), (3, 6571905), (5, 3943143), (9, 2190635), (15, 1314381), (23, 857205), (43, 458505), (45, 438127), (69, 285735), (115, 171441), (129, 152835), (207, 95245), (215, 91701), (345, 57147), (387, 50945), (443, 44505), (645, 30567), (989, 19935), (1035, 19049), (1329, 14835), (1935, 10189), (2215, 8901), (2967, 6645), (3987, 4945)]