256356860

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{180533}}^1$

素因数の和:180613

約数の個数: 24

約数和(自身を含む): 545934816

約数和(自身を除く): 289577956

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 180533, 361066, 722132, 902665, 1805330, 3610660, 12817843, 25635686, 51271372, 64089215, 128178430, 256356860]

約数ペア:

[(1, 256356860), (2, 128178430), (4, 64089215), (5, 51271372), (10, 25635686), (20, 12817843), (71, 3610660), (142, 1805330), (284, 902665), (355, 722132), (710, 361066), (1420, 180533)]