21521290

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{167}}^1\times {\mathrm{263}}^1$

素因数の和:451

約数の個数: 48

約数和(自身を含む): 45505152

約数和(自身を除く): 23983862

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 167, 245, 263, 334, 490, 526, 835, 1169, 1315, 1670, 1841, 2338, 2630, 3682, 5845, 8183, 9205, 11690, 12887, 16366, 18410, 25774, 40915, 43921, 64435, 81830, 87842, 128870, 219605, 307447, 439210, 614894, 1537235, 2152129, 3074470, 4304258, 10760645, 21521290]

約数ペア:

[(1, 21521290), (2, 10760645), (5, 4304258), (7, 3074470), (10, 2152129), (14, 1537235), (35, 614894), (49, 439210), (70, 307447), (98, 219605), (167, 128870), (245, 87842), (263, 81830), (334, 64435), (490, 43921), (526, 40915), (835, 25774), (1169, 18410), (1315, 16366), (1670, 12887), (1841, 11690), (2338, 9205), (2630, 8183), (3682, 5845)]