81744400

素因数分解:

$2^4\times 5^2\times {\mathrm{204361}}^1$

素因数の和:204379

約数の個数: 30

約数和(自身を含む): 196391882

約数和(自身を除く): 114647482

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 204361, 408722, 817444, 1021805, 1634888, 2043610, 3269776, 4087220, 5109025, 8174440, 10218050, 16348880, 20436100, 40872200, 81744400]

約数ペア:

[(1, 81744400), (2, 40872200), (4, 20436100), (5, 16348880), (8, 10218050), (10, 8174440), (16, 5109025), (20, 4087220), (25, 3269776), (40, 2043610), (50, 1634888), (80, 1021805), (100, 817444), (200, 408722), (400, 204361)]