856702940

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{392983}}^1$

素因数の和:393101

約数の個数: 24

約数和(自身を含む): 1815586080

約数和(自身を除く): 958883140

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 392983, 785966, 1571932, 1964915, 3929830, 7859660, 42835147, 85670294, 171340588, 214175735, 428351470, 856702940]

約数ペア:

[(1, 856702940), (2, 428351470), (4, 214175735), (5, 171340588), (10, 85670294), (20, 42835147), (109, 7859660), (218, 3929830), (436, 1964915), (545, 1571932), (1090, 785966), (2180, 392983)]