21910263

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 32288256

約数和(自身を除く): 10377993

約数列:

[1, 3, 17, 43, 51, 97, 103, 129, 291, 309, 731, 1649, 1751, 2193, 4171, 4429, 4947, 5253, 9991, 12513, 13287, 29973, 70907, 75293, 169847, 212721, 225879, 429613, 509541, 1288839, 7303421, 21910263]

約数ペア:

[(1, 21910263), (3, 7303421), (17, 1288839), (43, 509541), (51, 429613), (97, 225879), (103, 212721), (129, 169847), (291, 75293), (309, 70907), (731, 29973), (1649, 13287), (1751, 12513), (2193, 9991), (4171, 5253), (4429, 4947)]