256436080

素因数分解:

$2^4\times 5^1\times {\mathrm{787}}^1\times {\mathrm{4073}}^1$

素因数の和:4873

約数の個数: 40

約数和(自身を含む): 597118032

約数和(自身を除く): 340681952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 787, 1574, 3148, 3935, 4073, 6296, 7870, 8146, 12592, 15740, 16292, 20365, 31480, 32584, 40730, 62960, 65168, 81460, 162920, 325840, 3205451, 6410902, 12821804, 16027255, 25643608, 32054510, 51287216, 64109020, 128218040, 256436080]

約数ペア:

[(1, 256436080), (2, 128218040), (4, 64109020), (5, 51287216), (8, 32054510), (10, 25643608), (16, 16027255), (20, 12821804), (40, 6410902), (80, 3205451), (787, 325840), (1574, 162920), (3148, 81460), (3935, 65168), (4073, 62960), (6296, 40730), (7870, 32584), (8146, 31480), (12592, 20365), (15740, 16292)]