20897289

素因数分解:

$3^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{3727}}^1$

素因数の和:3829

約数の個数: 24

約数和(自身を含む): 34894080

約数和(自身を除く): 13996791

約数列:

[1, 3, 7, 9, 21, 63, 89, 267, 623, 801, 1869, 3727, 5607, 11181, 26089, 33543, 78267, 234801, 331703, 995109, 2321921, 2985327, 6965763, 20897289]

約数ペア:

[(1, 20897289), (3, 6965763), (7, 2985327), (9, 2321921), (21, 995109), (63, 331703), (89, 234801), (267, 78267), (623, 33543), (801, 26089), (1869, 11181), (3727, 5607)]