21531909

素因数分解:

$3^1\times 7^1\times {\mathrm{577}}^1\times {\mathrm{1777}}^1$

素因数の和:2364

約数の個数: 16

約数和(自身を含む): 32885888

約数和(自身を除く): 11353979

約数列:

[1, 3, 7, 21, 577, 1731, 1777, 4039, 5331, 12117, 12439, 37317, 1025329, 3075987, 7177303, 21531909]

約数ペア:

[(1, 21531909), (3, 7177303), (7, 3075987), (21, 1025329), (577, 37317), (1731, 12439), (1777, 12117), (4039, 5331)]