21195685

素因数分解:

$5^1\times 7^3\times {\mathrm{17}}^1\times {\mathrm{727}}^1$

素因数の和:770

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10253915

約数列:

[1, 5, 7, 17, 35, 49, 85, 119, 245, 343, 595, 727, 833, 1715, 3635, 4165, 5089, 5831, 12359, 25445, 29155, 35623, 61795, 86513, 178115, 249361, 432565, 605591, 1246805, 3027955, 4239137, 21195685]

約数ペア:

[(1, 21195685), (5, 4239137), (7, 3027955), (17, 1246805), (35, 605591), (49, 432565), (85, 249361), (119, 178115), (245, 86513), (343, 61795), (595, 35623), (727, 29155), (833, 25445), (1715, 12359), (3635, 5831), (4165, 5089)]