21679180

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13721}}^1$

素因数の和:13809

約数の個数: 24

約数和(自身を含む): 46105920

約数和(自身を除く): 24426740

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13721, 27442, 54884, 68605, 137210, 274420, 1083959, 2167918, 4335836, 5419795, 10839590, 21679180]

約数ペア:

[(1, 21679180), (2, 10839590), (4, 5419795), (5, 4335836), (10, 2167918), (20, 1083959), (79, 274420), (158, 137210), (316, 68605), (395, 54884), (790, 27442), (1580, 13721)]