845420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1031}}^1$

素因数の和:1081

約数の個数: 24

約数和(自身を含む): 1820448

約数和(自身を除く): 975028

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 1031, 2062, 4124, 5155, 10310, 20620, 42271, 84542, 169084, 211355, 422710, 845420]

約数ペア:

[(1, 845420), (2, 422710), (4, 211355), (5, 169084), (10, 84542), (20, 42271), (41, 20620), (82, 10310), (164, 5155), (205, 4124), (410, 2062), (820, 1031)]