21405850

素因数分解:

$2^1\times 5^2\times {\mathrm{127}}^1\times {\mathrm{3371}}^1$

素因数の和:3510

約数の個数: 24

約数和(自身を含む): 40140288

約数和(自身を除く): 18734438

約数列:

[1, 2, 5, 10, 25, 50, 127, 254, 635, 1270, 3175, 3371, 6350, 6742, 16855, 33710, 84275, 168550, 428117, 856234, 2140585, 4281170, 10702925, 21405850]

約数ペア:

[(1, 21405850), (2, 10702925), (5, 4281170), (10, 2140585), (25, 856234), (50, 428117), (127, 168550), (254, 84275), (635, 33710), (1270, 16855), (3175, 6742), (3371, 6350)]