209718340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{806609}}^1$

素因数の和:806631

約数の個数: 24

約数和(自身を含む): 474286680

約数和(自身を除く): 264568340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 806609, 1613218, 3226436, 4033045, 8066090, 10485917, 16132180, 20971834, 41943668, 52429585, 104859170, 209718340]

約数ペア:

[(1, 209718340), (2, 104859170), (4, 52429585), (5, 41943668), (10, 20971834), (13, 16132180), (20, 10485917), (26, 8066090), (52, 4033045), (65, 3226436), (130, 1613218), (260, 806609)]