21561351

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{14461}}^1$

素因数の和:14542

約数の個数: 16

約数和(自身を含む): 33320448

約数和(自身を除く): 11759097

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 14461, 43383, 101227, 303681, 1026731, 3080193, 7187117, 21561351]

約数ペア:

[(1, 21561351), (3, 7187117), (7, 3080193), (21, 1026731), (71, 303681), (213, 101227), (497, 43383), (1491, 14461)]