18226960

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{5557}}^1$

素因数の和:5611

約数の個数: 40

約数和(自身を含む): 43419096

約数和(自身を除く): 25192136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 5557, 11114, 22228, 27785, 44456, 55570, 88912, 111140, 222280, 227837, 444560, 455674, 911348, 1139185, 1822696, 2278370, 3645392, 4556740, 9113480, 18226960]

約数ペア:

[(1, 18226960), (2, 9113480), (4, 4556740), (5, 3645392), (8, 2278370), (10, 1822696), (16, 1139185), (20, 911348), (40, 455674), (41, 444560), (80, 227837), (82, 222280), (164, 111140), (205, 88912), (328, 55570), (410, 44456), (656, 27785), (820, 22228), (1640, 11114), (3280, 5557)]