7787420

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{971}}^1$

素因数の和:1381

約数の個数: 24

約数和(自身を含む): 16411248

約数和(自身を除く): 8623828

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 971, 1604, 1942, 2005, 3884, 4010, 4855, 8020, 9710, 19420, 389371, 778742, 1557484, 1946855, 3893710, 7787420]

約数ペア:

[(1, 7787420), (2, 3893710), (4, 1946855), (5, 1557484), (10, 778742), (20, 389371), (401, 19420), (802, 9710), (971, 8020), (1604, 4855), (1942, 4010), (2005, 3884)]