19978280

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10193}}^1$

素因数の和:10218

約数の個数: 48

約数和(自身を含む): 52295220

約数和(自身を除く): 32316940

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10193, 20386, 40772, 50965, 71351, 81544, 101930, 142702, 203860, 285404, 356755, 407720, 499457, 570808, 713510, 998914, 1427020, 1997828, 2497285, 2854040, 3995656, 4994570, 9989140, 19978280]

約数ペア:

[(1, 19978280), (2, 9989140), (4, 4994570), (5, 3995656), (7, 2854040), (8, 2497285), (10, 1997828), (14, 1427020), (20, 998914), (28, 713510), (35, 570808), (40, 499457), (49, 407720), (56, 356755), (70, 285404), (98, 203860), (140, 142702), (196, 101930), (245, 81544), (280, 71351), (392, 50965), (490, 40772), (980, 20386), (1960, 10193)]