256571560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{479}}^1\times {\mathrm{1913}}^1$

素因数の和:2410

約数の個数: 64

約数和(自身を含む): 661478400

約数和(自身を除く): 404906840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 479, 958, 1913, 1916, 2395, 3353, 3826, 3832, 4790, 6706, 7652, 9565, 9580, 13391, 13412, 15304, 16765, 19130, 19160, 26782, 26824, 33530, 38260, 53564, 66955, 67060, 76520, 107128, 133910, 134120, 267820, 535640, 916327, 1832654, 3665308, 4581635, 6414289, 7330616, 9163270, 12828578, 18326540, 25657156, 32071445, 36653080, 51314312, 64142890, 128285780, 256571560]

約数ペア:

[(1, 256571560), (2, 128285780), (4, 64142890), (5, 51314312), (7, 36653080), (8, 32071445), (10, 25657156), (14, 18326540), (20, 12828578), (28, 9163270), (35, 7330616), (40, 6414289), (56, 4581635), (70, 3665308), (140, 1832654), (280, 916327), (479, 535640), (958, 267820), (1913, 134120), (1916, 133910), (2395, 107128), (3353, 76520), (3826, 67060), (3832, 66955), (4790, 53564), (6706, 38260), (7652, 33530), (9565, 26824), (9580, 26782), (13391, 19160), (13412, 19130), (15304, 16765)]