21878360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{78137}}^1$

素因数の和:78155

約数の個数: 32

約数和(自身を含む): 56259360

約数和(自身を除く): 34381000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 78137, 156274, 312548, 390685, 546959, 625096, 781370, 1093918, 1562740, 2187836, 2734795, 3125480, 4375672, 5469590, 10939180, 21878360]

約数ペア:

[(1, 21878360), (2, 10939180), (4, 5469590), (5, 4375672), (7, 3125480), (8, 2734795), (10, 2187836), (14, 1562740), (20, 1093918), (28, 781370), (35, 625096), (40, 546959), (56, 390685), (70, 312548), (140, 156274), (280, 78137)]