21286520

素因数分解:

$2^3\times 5^1\times {\mathrm{532163}}^1$

素因数の和:532174

約数の個数: 16

約数和(自身を含む): 47894760

約数和(自身を除く): 26608240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 532163, 1064326, 2128652, 2660815, 4257304, 5321630, 10643260, 21286520]

約数ペア:

[(1, 21286520), (2, 10643260), (4, 5321630), (5, 4257304), (8, 2660815), (10, 2128652), (20, 1064326), (40, 532163)]