21356859

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{401}}^1\times {\mathrm{433}}^1$

素因数の和:878

約数の個数: 16

約数和(自身を含む): 29310624

約数和(自身を除く): 7953765

約数列:

[1, 3, 41, 123, 401, 433, 1203, 1299, 16441, 17753, 49323, 53259, 173633, 520899, 7118953, 21356859]

約数ペア:

[(1, 21356859), (3, 7118953), (41, 520899), (123, 173633), (401, 53259), (433, 49323), (1203, 17753), (1299, 16441)]