81639145

素因数分解:

$5^1\times 7^3\times {\mathrm{181}}^1\times {\mathrm{263}}^1$

素因数の和:470

約数の個数: 32

約数和(自身を含む): 115315200

約数和(自身を除く): 33676055

約数列:

[1, 5, 7, 35, 49, 181, 245, 263, 343, 905, 1267, 1315, 1715, 1841, 6335, 8869, 9205, 12887, 44345, 47603, 62083, 64435, 90209, 238015, 310415, 333221, 451045, 1666105, 2332547, 11662735, 16327829, 81639145]

約数ペア:

[(1, 81639145), (5, 16327829), (7, 11662735), (35, 2332547), (49, 1666105), (181, 451045), (245, 333221), (263, 310415), (343, 238015), (905, 90209), (1267, 64435), (1315, 62083), (1715, 47603), (1841, 44345), (6335, 12887), (8869, 9205)]