21901281

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{2221}}^1$

素因数の和:2416

約数の個数: 16

約数和(自身を含む): 30930240

約数和(自身を除く): 9028959

約数列:

[1, 3, 19, 57, 173, 519, 2221, 3287, 6663, 9861, 42199, 126597, 384233, 1152699, 7300427, 21901281]

約数ペア:

[(1, 21901281), (3, 7300427), (19, 1152699), (57, 384233), (173, 126597), (519, 42199), (2221, 9861), (3287, 6663)]