19986925

素因数分解:

$5^2\times 7^1\times {\mathrm{181}}^1\times {\mathrm{631}}^1$

素因数の和:829

約数の個数: 24

約数和(自身を含む): 28525952

約数和(自身を除く): 8539027

約数列:

[1, 5, 7, 25, 35, 175, 181, 631, 905, 1267, 3155, 4417, 4525, 6335, 15775, 22085, 31675, 110425, 114211, 571055, 799477, 2855275, 3997385, 19986925]

約数ペア:

[(1, 19986925), (5, 3997385), (7, 2855275), (25, 799477), (35, 571055), (175, 114211), (181, 110425), (631, 31675), (905, 22085), (1267, 15775), (3155, 6335), (4417, 4525)]