78162800

素因数分解:

$2^4\times 5^2\times {\mathrm{195407}}^1$

素因数の和:195425

約数の個数: 30

約数和(自身を含む): 187787088

約数和(自身を除く): 109624288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 195407, 390814, 781628, 977035, 1563256, 1954070, 3126512, 3908140, 4885175, 7816280, 9770350, 15632560, 19540700, 39081400, 78162800]

約数ペア:

[(1, 78162800), (2, 39081400), (4, 19540700), (5, 15632560), (8, 9770350), (10, 7816280), (16, 4885175), (20, 3908140), (25, 3126512), (40, 1954070), (50, 1563256), (80, 977035), (100, 781628), (200, 390814), (400, 195407)]