78160400

素因数分解:

$2^4\times 5^2\times {\mathrm{195401}}^1$

素因数の和:195419

約数の個数: 30

約数和(自身を含む): 187781322

約数和(自身を除く): 109620922

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 195401, 390802, 781604, 977005, 1563208, 1954010, 3126416, 3908020, 4885025, 7816040, 9770050, 15632080, 19540100, 39080200, 78160400]

約数ペア:

[(1, 78160400), (2, 39080200), (4, 19540100), (5, 15632080), (8, 9770050), (10, 7816040), (16, 4885025), (20, 3908020), (25, 3126416), (40, 1954010), (50, 1563208), (80, 977005), (100, 781604), (200, 390802), (400, 195401)]