19947700

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{4639}}^1$

素因数の和:4696

約数の個数: 36

約数和(自身を含む): 44302720

約数和(自身を除く): 24355020

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 172, 215, 430, 860, 1075, 2150, 4300, 4639, 9278, 18556, 23195, 46390, 92780, 115975, 199477, 231950, 398954, 463900, 797908, 997385, 1994770, 3989540, 4986925, 9973850, 19947700]

約数ペア:

[(1, 19947700), (2, 9973850), (4, 4986925), (5, 3989540), (10, 1994770), (20, 997385), (25, 797908), (43, 463900), (50, 398954), (86, 231950), (100, 199477), (172, 115975), (215, 92780), (430, 46390), (860, 23195), (1075, 18556), (2150, 9278), (4300, 4639)]