21128081

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{509}}^1$

素因数の和:656

約数の個数: 16

約数和(自身を含む): 23761920

約数和(自身を除く): 2633839

約数列:

[1, 13, 31, 103, 403, 509, 1339, 3193, 6617, 15779, 41509, 52427, 205127, 681551, 1625237, 21128081]

約数ペア:

[(1, 21128081), (13, 1625237), (31, 681551), (103, 205127), (403, 52427), (509, 41509), (1339, 15779), (3193, 6617)]