256340560

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{65393}}^1$

素因数の和:65420

約数の個数: 60

約数和(自身を含む): 693307188

約数和(自身を除く): 436966628

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 65393, 130786, 261572, 326965, 457751, 523144, 653930, 915502, 1046288, 1307860, 1831004, 2288755, 2615720, 3204257, 3662008, 4577510, 5231440, 6408514, 7324016, 9155020, 12817028, 16021285, 18310040, 25634056, 32042570, 36620080, 51268112, 64085140, 128170280, 256340560]

約数ペア:

[(1, 256340560), (2, 128170280), (4, 64085140), (5, 51268112), (7, 36620080), (8, 32042570), (10, 25634056), (14, 18310040), (16, 16021285), (20, 12817028), (28, 9155020), (35, 7324016), (40, 6408514), (49, 5231440), (56, 4577510), (70, 3662008), (80, 3204257), (98, 2615720), (112, 2288755), (140, 1831004), (196, 1307860), (245, 1046288), (280, 915502), (392, 653930), (490, 523144), (560, 457751), (784, 326965), (980, 261572), (1960, 130786), (3920, 65393)]