18704380

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1459}}^1$

素因数の和:2109

約数の個数: 24

約数和(自身を含む): 39367440

約数和(自身を除く): 20663060

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 1459, 2564, 2918, 3205, 5836, 6410, 7295, 12820, 14590, 29180, 935219, 1870438, 3740876, 4676095, 9352190, 18704380]

約数ペア:

[(1, 18704380), (2, 9352190), (4, 4676095), (5, 3740876), (10, 1870438), (20, 935219), (641, 29180), (1282, 14590), (1459, 12820), (2564, 7295), (2918, 6410), (3205, 5836)]