19949720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71249}}^1$

素因数の和:71267

約数の個数: 32

約数和(自身を含む): 51300000

約数和(自身を除く): 31350280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71249, 142498, 284996, 356245, 498743, 569992, 712490, 997486, 1424980, 1994972, 2493715, 2849960, 3989944, 4987430, 9974860, 19949720]

約数ペア:

[(1, 19949720), (2, 9974860), (4, 4987430), (5, 3989944), (7, 2849960), (8, 2493715), (10, 1994972), (14, 1424980), (20, 997486), (28, 712490), (35, 569992), (40, 498743), (56, 356245), (70, 284996), (140, 142498), (280, 71249)]