21012531

素因数分解:

$3^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1\times {\mathrm{421}}^1$

素因数の和:682

約数の個数: 16

約数和(自身を含む): 28520448

約数和(自身を除く): 7507917

約数列:

[1, 3, 127, 131, 381, 393, 421, 1263, 16637, 49911, 53467, 55151, 160401, 165453, 7004177, 21012531]

約数ペア:

[(1, 21012531), (3, 7004177), (127, 165453), (131, 160401), (381, 55151), (393, 53467), (421, 49911), (1263, 16637)]