1378820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{971}}^1$

素因数の和:1051

約数の個数: 24

約数和(自身を含む): 2939328

約数和(自身を除く): 1560508

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 971, 1420, 1942, 3884, 4855, 9710, 19420, 68941, 137882, 275764, 344705, 689410, 1378820]

約数ペア:

[(1, 1378820), (2, 689410), (4, 344705), (5, 275764), (10, 137882), (20, 68941), (71, 19420), (142, 9710), (284, 4855), (355, 3884), (710, 1942), (971, 1420)]