21251331

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{617}}^1$

素因数の和:755

約数の個数: 24

約数和(自身を含む): 31814640

約数和(自身を除く): 10563309

約数列:

[1, 3, 9, 43, 89, 129, 267, 387, 617, 801, 1851, 3827, 5553, 11481, 26531, 34443, 54913, 79593, 164739, 238779, 494217, 2361259, 7083777, 21251331]

約数ペア:

[(1, 21251331), (3, 7083777), (9, 2361259), (43, 494217), (89, 238779), (129, 164739), (267, 79593), (387, 54913), (617, 34443), (801, 26531), (1851, 11481), (3827, 5553)]