129021380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{208099}}^1$

素因数の和:208139

約数の個数: 24

約数和(自身を含む): 279686400

約数和(自身を除く): 150665020

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 208099, 416198, 832396, 1040495, 2080990, 4161980, 6451069, 12902138, 25804276, 32255345, 64510690, 129021380]

約数ペア:

[(1, 129021380), (2, 64510690), (4, 32255345), (5, 25804276), (10, 12902138), (20, 6451069), (31, 4161980), (62, 2080990), (124, 1040495), (155, 832396), (310, 416198), (620, 208099)]