21690628

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{1709}}^1$

素因数の和:1899

約数の個数: 24

約数和(自身を含む): 40219200

約数和(自身を除く): 18528572

約数列:

[1, 2, 4, 19, 38, 76, 167, 334, 668, 1709, 3173, 3418, 6346, 6836, 12692, 32471, 64942, 129884, 285403, 570806, 1141612, 5422657, 10845314, 21690628]

約数ペア:

[(1, 21690628), (2, 10845314), (4, 5422657), (19, 1141612), (38, 570806), (76, 285403), (167, 129884), (334, 64942), (668, 32471), (1709, 12692), (3173, 6836), (3418, 6346)]