21931329

素因数分解:

$3^1\times 7^1\times {\mathrm{787}}^1\times {\mathrm{1327}}^1$

素因数の和:2124

約数の個数: 16

約数和(自身を含む): 33486848

約数和(自身を除く): 11555519

約数列:

[1, 3, 7, 21, 787, 1327, 2361, 3981, 5509, 9289, 16527, 27867, 1044349, 3133047, 7310443, 21931329]

約数ペア:

[(1, 21931329), (3, 7310443), (7, 3133047), (21, 1044349), (787, 27867), (1327, 16527), (2361, 9289), (3981, 5509)]