21112420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7937}}^1$

素因数の和:7972

約数の個数: 48

約数和(自身を含む): 53343360

約数和(自身を除く): 32230940

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7937, 15874, 31748, 39685, 55559, 79370, 111118, 150803, 158740, 222236, 277795, 301606, 555590, 603212, 754015, 1055621, 1111180, 1508030, 2111242, 3016060, 4222484, 5278105, 10556210, 21112420]

約数ペア:

[(1, 21112420), (2, 10556210), (4, 5278105), (5, 4222484), (7, 3016060), (10, 2111242), (14, 1508030), (19, 1111180), (20, 1055621), (28, 754015), (35, 603212), (38, 555590), (70, 301606), (76, 277795), (95, 222236), (133, 158740), (140, 150803), (190, 111118), (266, 79370), (380, 55559), (532, 39685), (665, 31748), (1330, 15874), (2660, 7937)]