256421816

素因数分解:

$2^3\times 7^1\times {\mathrm{89}}^1\times {\mathrm{51449}}^1$

素因数の和:51551

約数の個数: 32

約数和(自身を含む): 555660000

約数和(自身を除く): 299238184

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 89, 178, 356, 623, 712, 1246, 2492, 4984, 51449, 102898, 205796, 360143, 411592, 720286, 1440572, 2881144, 4578961, 9157922, 18315844, 32052727, 36631688, 64105454, 128210908, 256421816]

約数ペア:

[(1, 256421816), (2, 128210908), (4, 64105454), (7, 36631688), (8, 32052727), (14, 18315844), (28, 9157922), (56, 4578961), (89, 2881144), (178, 1440572), (356, 720286), (623, 411592), (712, 360143), (1246, 205796), (2492, 102898), (4984, 51449)]