21000978855

素因数分解:

$3^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{568439}}^1$

素因数の和:569271

約数の個数: 24

約数和(自身を含む): 36446099040

約数和(自身を除く): 15445120185

約数列:

[1, 3, 5, 9, 15, 45, 821, 2463, 4105, 7389, 12315, 36945, 568439, 1705317, 2842195, 5115951, 8526585, 25579755, 466688419, 1400065257, 2333442095, 4200195771, 7000326285, 21000978855]

約数ペア:

[(1, 21000978855), (3, 7000326285), (5, 4200195771), (9, 2333442095), (15, 1400065257), (45, 466688419), (821, 25579755), (2463, 8526585), (4105, 5115951), (7389, 2842195), (12315, 1705317), (36945, 568439)]