18989488

素因数分解:

$2^4\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3943}}^1$

素因数の和:4001

約数の個数: 40

約数和(自身を含む): 43036928

約数和(自身を除く): 24047440

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 43, 56, 86, 112, 172, 301, 344, 602, 688, 1204, 2408, 3943, 4816, 7886, 15772, 27601, 31544, 55202, 63088, 110404, 169549, 220808, 339098, 441616, 678196, 1186843, 1356392, 2373686, 2712784, 4747372, 9494744, 18989488]

約数ペア:

[(1, 18989488), (2, 9494744), (4, 4747372), (7, 2712784), (8, 2373686), (14, 1356392), (16, 1186843), (28, 678196), (43, 441616), (56, 339098), (86, 220808), (112, 169549), (172, 110404), (301, 63088), (344, 55202), (602, 31544), (688, 27601), (1204, 15772), (2408, 7886), (3943, 4816)]