21281365

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{761}}^1$

素因数の和:837

約数の個数: 32

約数和(自身を含む): 31601664

約数和(自身を除く): 10320299

約数列:

[1, 5, 7, 17, 35, 47, 85, 119, 235, 329, 595, 761, 799, 1645, 3805, 3995, 5327, 5593, 12937, 26635, 27965, 35767, 64685, 90559, 178835, 250369, 452795, 608039, 1251845, 3040195, 4256273, 21281365]

約数ペア:

[(1, 21281365), (5, 4256273), (7, 3040195), (17, 1251845), (35, 608039), (47, 452795), (85, 250369), (119, 178835), (235, 90559), (329, 64685), (595, 35767), (761, 27965), (799, 26635), (1645, 12937), (3805, 5593), (3995, 5327)]