21308763

素因数分解:

$3^1\times 7^1\times {\mathrm{641}}^1\times {\mathrm{1583}}^1$

素因数の和:2234

約数の個数: 16

約数和(自身を含む): 32541696

約数和(自身を除く): 11232933

約数列:

[1, 3, 7, 21, 641, 1583, 1923, 4487, 4749, 11081, 13461, 33243, 1014703, 3044109, 7102921, 21308763]

約数ペア:

[(1, 21308763), (3, 7102921), (7, 3044109), (21, 1014703), (641, 33243), (1583, 13461), (1923, 11081), (4487, 4749)]