21947345

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{3089}}^1$

素因数の和:3137

約数の個数: 24

約数和(自身を含む): 31703400

約数和(自身を除く): 9756055

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 3089, 7105, 15445, 21623, 89581, 108115, 151361, 447905, 627067, 756805, 3135335, 4389469, 21947345]

約数ペア:

[(1, 21947345), (5, 4389469), (7, 3135335), (29, 756805), (35, 627067), (49, 447905), (145, 151361), (203, 108115), (245, 89581), (1015, 21623), (1421, 15445), (3089, 7105)]