7942780

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{971}}^1$

素因数の和:1389

約数の個数: 24

約数和(自身を含む): 16737840

約数和(自身を除く): 8795060

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 971, 1636, 1942, 2045, 3884, 4090, 4855, 8180, 9710, 19420, 397139, 794278, 1588556, 1985695, 3971390, 7942780]

約数ペア:

[(1, 7942780), (2, 3971390), (4, 1985695), (5, 1588556), (10, 794278), (20, 397139), (409, 19420), (818, 9710), (971, 8180), (1636, 4855), (1942, 4090), (2045, 3884)]