21153531

素因数分解:

$3^1\times 7^1\times {\mathrm{509}}^1\times {\mathrm{1979}}^1$

素因数の和:2498

約数の個数: 16

約数和(自身を含む): 32313600

約数和(自身を除く): 11160069

約数列:

[1, 3, 7, 21, 509, 1527, 1979, 3563, 5937, 10689, 13853, 41559, 1007311, 3021933, 7051177, 21153531]

約数ペア:

[(1, 21153531), (3, 7051177), (7, 3021933), (21, 1007311), (509, 41559), (1527, 13853), (1979, 10689), (3563, 5937)]