18218000

素因数分解:

$2^4\times 5^3\times {\mathrm{9109}}^1$

素因数の和:9132

約数の個数: 40

約数和(自身を含む): 44055960

約数和(自身を除く): 25837960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 9109, 18218, 36436, 45545, 72872, 91090, 145744, 182180, 227725, 364360, 455450, 728720, 910900, 1138625, 1821800, 2277250, 3643600, 4554500, 9109000, 18218000]

約数ペア:

[(1, 18218000), (2, 9109000), (4, 4554500), (5, 3643600), (8, 2277250), (10, 1821800), (16, 1138625), (20, 910900), (25, 728720), (40, 455450), (50, 364360), (80, 227725), (100, 182180), (125, 145744), (200, 91090), (250, 72872), (400, 45545), (500, 36436), (1000, 18218), (2000, 9109)]