80912720

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{20641}}^1$

素因数の和:20668

約数の個数: 60

約数和(自身を含む): 218846484

約数和(自身を除く): 137933764

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 20641, 41282, 82564, 103205, 144487, 165128, 206410, 288974, 330256, 412820, 577948, 722435, 825640, 1011409, 1155896, 1444870, 1651280, 2022818, 2311792, 2889740, 4045636, 5057045, 5779480, 8091272, 10114090, 11558960, 16182544, 20228180, 40456360, 80912720]

約数ペア:

[(1, 80912720), (2, 40456360), (4, 20228180), (5, 16182544), (7, 11558960), (8, 10114090), (10, 8091272), (14, 5779480), (16, 5057045), (20, 4045636), (28, 2889740), (35, 2311792), (40, 2022818), (49, 1651280), (56, 1444870), (70, 1155896), (80, 1011409), (98, 825640), (112, 722435), (140, 577948), (196, 412820), (245, 330256), (280, 288974), (392, 206410), (490, 165128), (560, 144487), (784, 103205), (980, 82564), (1960, 41282), (3920, 20641)]