21508809

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{15287}}^1$

素因数の和:15364

約数の個数: 16

約数和(自身を含む): 33266688

約数和(自身を除く): 11757879

約数列:

[1, 3, 7, 21, 67, 201, 469, 1407, 15287, 45861, 107009, 321027, 1024229, 3072687, 7169603, 21508809]

約数ペア:

[(1, 21508809), (3, 7169603), (7, 3072687), (21, 1024229), (67, 321027), (201, 107009), (469, 45861), (1407, 15287)]