21516155

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{839}}^1$

素因数の和:1090

約数の個数: 16

約数和(自身を含む): 27095040

約数和(自身を除く): 5578885

約数列:

[1, 5, 23, 115, 223, 839, 1115, 4195, 5129, 19297, 25645, 96485, 187097, 935485, 4303231, 21516155]

約数ペア:

[(1, 21516155), (5, 4303231), (23, 935485), (115, 187097), (223, 96485), (839, 25645), (1115, 19297), (4195, 5129)]