21716397

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:322

約数の個数: 32

約数和(自身を含む): 33369600

約数和(自身を除く): 11653203

約数列:

[1, 3, 9, 27, 47, 109, 141, 157, 327, 423, 471, 981, 1269, 1413, 2943, 4239, 5123, 7379, 15369, 17113, 22137, 46107, 51339, 66411, 138321, 154017, 199233, 462051, 804311, 2412933, 7238799, 21716397]

約数ペア:

[(1, 21716397), (3, 7238799), (9, 2412933), (27, 804311), (47, 462051), (109, 199233), (141, 154017), (157, 138321), (327, 66411), (423, 51339), (471, 46107), (981, 22137), (1269, 17113), (1413, 15369), (2943, 7379), (4239, 5123)]