81805000

素因数分解:

$2^3\times 5^4\times {\mathrm{16361}}^1$

素因数の和:16387

約数の個数: 40

約数和(自身を含む): 191680830

約数和(自身を除く): 109875830

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 5000, 16361, 32722, 65444, 81805, 130888, 163610, 327220, 409025, 654440, 818050, 1636100, 2045125, 3272200, 4090250, 8180500, 10225625, 16361000, 20451250, 40902500, 81805000]

約数ペア:

[(1, 81805000), (2, 40902500), (4, 20451250), (5, 16361000), (8, 10225625), (10, 8180500), (20, 4090250), (25, 3272200), (40, 2045125), (50, 1636100), (100, 818050), (125, 654440), (200, 409025), (250, 327220), (500, 163610), (625, 130888), (1000, 81805), (1250, 65444), (2500, 32722), (5000, 16361)]