12840920

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{3607}}^1$

素因数の和:3707

約数の個数: 32

約数和(自身を含む): 29224800

約数和(自身を除く): 16383880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 3607, 7214, 14428, 18035, 28856, 36070, 72140, 144280, 321023, 642046, 1284092, 1605115, 2568184, 3210230, 6420460, 12840920]

約数ペア:

[(1, 12840920), (2, 6420460), (4, 3210230), (5, 2568184), (8, 1605115), (10, 1284092), (20, 642046), (40, 321023), (89, 144280), (178, 72140), (356, 36070), (445, 28856), (712, 18035), (890, 14428), (1780, 7214), (3560, 3607)]