278311385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{220009}}^1$

素因数の和:220048

約数の個数: 16

約数和(自身を含む): 380177280

約数和(自身を除く): 101865895

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 220009, 1100045, 2420099, 5060207, 12100495, 25301035, 55662277, 278311385]

約数ペア:

[(1, 278311385), (5, 55662277), (11, 25301035), (23, 12100495), (55, 5060207), (115, 2420099), (253, 1100045), (1265, 220009)]