12978940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{49919}}^1$

素因数の和:49941

約数の個数: 24

約数和(自身を含む): 29352960

約数和(自身を除く): 16374020

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 49919, 99838, 199676, 249595, 499190, 648947, 998380, 1297894, 2595788, 3244735, 6489470, 12978940]

約数ペア:

[(1, 12978940), (2, 6489470), (4, 3244735), (5, 2595788), (10, 1297894), (13, 998380), (20, 648947), (26, 499190), (52, 249595), (65, 199676), (130, 99838), (260, 49919)]