21001520

素因数分解:

$2^4\times 5^1\times {\mathrm{262519}}^1$

素因数の和:262532

約数の個数: 20

約数和(自身を含む): 48828720

約数和(自身を除く): 27827200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262519, 525038, 1050076, 1312595, 2100152, 2625190, 4200304, 5250380, 10500760, 21001520]

約数ペア:

[(1, 21001520), (2, 10500760), (4, 5250380), (5, 4200304), (8, 2625190), (10, 2100152), (16, 1312595), (20, 1050076), (40, 525038), (80, 262519)]