21000815480

素因数分解:

$2^3\times 5^1\times {\mathrm{525020387}}^1$

素因数の和:525020398

約数の個数: 16

約数和(自身を含む): 47251834920

約数和(自身を除く): 26251019440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525020387, 1050040774, 2100081548, 2625101935, 4200163096, 5250203870, 10500407740, 21000815480]

約数ペア:

[(1, 21000815480), (2, 10500407740), (4, 5250203870), (5, 4200163096), (8, 2625101935), (10, 2100081548), (20, 1050040774), (40, 525020387)]