21085275

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{6857}}^1$

素因数の和:6911

約数の個数: 24

約数和(自身を含む): 35716464

約数和(自身を除く): 14631189

約数列:

[1, 3, 5, 15, 25, 41, 75, 123, 205, 615, 1025, 3075, 6857, 20571, 34285, 102855, 171425, 281137, 514275, 843411, 1405685, 4217055, 7028425, 21085275]

約数ペア:

[(1, 21085275), (3, 7028425), (5, 4217055), (15, 1405685), (25, 843411), (41, 514275), (75, 281137), (123, 171425), (205, 102855), (615, 34285), (1025, 20571), (3075, 6857)]