81780620

素因数分解:

$2^2\times 5^1\times {\mathrm{379}}^1\times {\mathrm{10789}}^1$

素因数の和:11177

約数の個数: 24

約数和(自身を含む): 172208400

約数和(自身を除く): 90427780

約数列:

[1, 2, 4, 5, 10, 20, 379, 758, 1516, 1895, 3790, 7580, 10789, 21578, 43156, 53945, 107890, 215780, 4089031, 8178062, 16356124, 20445155, 40890310, 81780620]

約数ペア:

[(1, 81780620), (2, 40890310), (4, 20445155), (5, 16356124), (10, 8178062), (20, 4089031), (379, 215780), (758, 107890), (1516, 53945), (1895, 43156), (3790, 21578), (7580, 10789)]