21609255

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{857}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 35480016

約数和(自身を除く): 13870761

約数列:

[1, 3, 5, 15, 41, 123, 205, 615, 857, 1681, 2571, 4285, 5043, 8405, 12855, 25215, 35137, 105411, 175685, 527055, 1440617, 4321851, 7203085, 21609255]

約数ペア:

[(1, 21609255), (3, 7203085), (5, 4321851), (15, 1440617), (41, 527055), (123, 175685), (205, 105411), (615, 35137), (857, 25215), (1681, 12855), (2571, 8405), (4285, 5043)]