19987088

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:220

約数の個数: 80

約数和(自身を含む): 45830400

約数和(自身を除く): 25843312

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 43, 44, 76, 86, 88, 139, 152, 172, 176, 209, 278, 304, 344, 418, 473, 556, 688, 817, 836, 946, 1112, 1529, 1634, 1672, 1892, 2224, 2641, 3058, 3268, 3344, 3784, 5282, 5977, 6116, 6536, 7568, 8987, 10564, 11954, 12232, 13072, 17974, 21128, 23908, 24464, 29051, 35948, 42256, 47816, 58102, 65747, 71896, 95632, 113563, 116204, 131494, 143792, 227126, 232408, 262988, 454252, 464816, 525976, 908504, 1051952, 1249193, 1817008, 2498386, 4996772, 9993544, 19987088]

約数ペア:

[(1, 19987088), (2, 9993544), (4, 4996772), (8, 2498386), (11, 1817008), (16, 1249193), (19, 1051952), (22, 908504), (38, 525976), (43, 464816), (44, 454252), (76, 262988), (86, 232408), (88, 227126), (139, 143792), (152, 131494), (172, 116204), (176, 113563), (209, 95632), (278, 71896), (304, 65747), (344, 58102), (418, 47816), (473, 42256), (556, 35948), (688, 29051), (817, 24464), (836, 23908), (946, 21128), (1112, 17974), (1529, 13072), (1634, 12232), (1672, 11954), (1892, 10564), (2224, 8987), (2641, 7568), (3058, 6536), (3268, 6116), (3344, 5977), (3784, 5282)]