138655580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{990397}}^1$

素因数の和:990413

約数の個数: 24

約数和(自身を含む): 332773728

約数和(自身を除く): 194118148

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 990397, 1980794, 3961588, 4951985, 6932779, 9903970, 13865558, 19807940, 27731116, 34663895, 69327790, 138655580]

約数ペア:

[(1, 138655580), (2, 69327790), (4, 34663895), (5, 27731116), (7, 19807940), (10, 13865558), (14, 9903970), (20, 6932779), (28, 4951985), (35, 3961588), (70, 1980794), (140, 990397)]