18943340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72859}}^1$

素因数の和:72881

約数の個数: 24

約数和(自身を含む): 42841680

約数和(自身を除く): 23898340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72859, 145718, 291436, 364295, 728590, 947167, 1457180, 1894334, 3788668, 4735835, 9471670, 18943340]

約数ペア:

[(1, 18943340), (2, 9471670), (4, 4735835), (5, 3788668), (10, 1894334), (13, 1457180), (20, 947167), (26, 728590), (52, 364295), (65, 291436), (130, 145718), (260, 72859)]