21400278

素因数分解:

$2^1\times 3^1\times {\mathrm{41}}^1\times {\mathrm{86993}}^1$

素因数の和:87039

約数の個数: 16

約数和(自身を含む): 43844976

約数和(自身を除く): 22444698

約数列:

[1, 2, 3, 6, 41, 82, 123, 246, 86993, 173986, 260979, 521958, 3566713, 7133426, 10700139, 21400278]

約数ペア:

[(1, 21400278), (2, 10700139), (3, 7133426), (6, 3566713), (41, 521958), (82, 260979), (123, 173986), (246, 86993)]