21381951

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{1327}}^1$

素因数の和:1502

約数の個数: 16

約数和(自身を含む): 29449728

約数和(自身を除く): 8067777

約数列:

[1, 3, 41, 123, 131, 393, 1327, 3981, 5371, 16113, 54407, 163221, 173837, 521511, 7127317, 21381951]

約数ペア:

[(1, 21381951), (3, 7127317), (41, 521511), (123, 173837), (131, 163221), (393, 54407), (1327, 16113), (3981, 5371)]